When driving, we always can meet such and such trouble, have a plenty of true breakdown, have a plenty of false breakdown, can you distinguish the difference of both really? And to evaluating division for, understanding masters car primary failure, also be the one step with professional very important development, read the article with this full dried food and nuts, do not be afraid that you do not understand, be worth to collect very!
1, vent-pipe risks black smoke
Breakdown decides: True breakdown
Case study: Show mixture energy of life is too strong, combustion is not complete. Main reason is car engine excess load, air cylinder pressure is insufficient, engine temperature is too low, carburettor is adjusted undeserved, air filter core jams, individual air cylinder does not work reach ignition to wait behindhand too. When eliminating, answer to check block air door in time to be opened whether completely, undertake the overhaul when necessary; Look from carburettor mouth after flameout advocate spray pipe, if have oily outpour or dribble, criterion oily area of carburettor float chamber is exorbitant, should adjust formulary range, screw or change advocate quantity aperture; Air filter jams, should clean, dredge or change.
2, the aerosol of the vent-pipe eduction blue of car
Breakdown decides: True breakdown
Case study: Because a large number of engine oil enter air cylinder,be, and cannot burn completely be caused by. Tear open next sparkplug, can discover serious carbon deposit phenomenon. Need to check oil of engine oil feet the face is exorbitant; Whether do air cylinder and piston clearance pass big; Whether is piston annulus installed instead; Whether inlet valve conduit wears away or sealing ring damages; Air cylinder is filled up whether ablation, should give when necessary repair.
3, car vent-pipe risks Bai Yan, when cold car serious, bai Yan is not risked after hot car
Breakdown decides: False breakdown
Case study: Because moisture content is contained in benzine,this is, and engine super-cooling, the fuel unfinished complete combustion that enters air cylinder right now brings about mist to nod or vapor generation forms Bai Yan. Winter or monsoon are become car the first time when starting, often can see a Bai Yan. This nevers mind, once engine temperature is elevatory, bai Yan can disappear. This state need not be overhauled.
4, engine noise is big, car place walks when quickening footplate, have " grand, grand " abnormal knocking, there is oscillatory feeling inside engine cabin
Breakdown decides: Use kind of breakdown
Case study: Cite litre of traffic, the bottom fender that can see engine has knock against mark. If road surface has fraise and pass forcibly, engine base fender is about by knock against. After bottom fender is out of shape, be apart from with the carapace end engine oil become close, if the distance is too close, can give out abnormal knocking when the carapace end the oil when quickening and bottom fender barge against and make automobile body oscillatory. So, in drive a vehicle must observe road surface carefully, do not cause phenomenon pulling a copy to happen. Processing technique: Tear open fender laying a foundation, planish is corrective can.
5, of car change direction dish always be frame-up, a little while towards the left, a little while right, rove
Breakdown decides: True breakdown
Case study: Because secure the balata in turning to machine groove,this is complete already attaint brings about spacing piece. Will new spacing piece after outfit answer, breakdown disappears completely.
6, every time when open air conditioning, its give blast tuyere to have very bad taste, when weather is damp more serious
Breakdown decides: Safeguard kind of breakdown
Case study: The refrigeration principle of air conditioning is to pass refrigeration agent to evaporate quickly absorption of heat, make shed the air temperature of classics to drop quickly. Because the temperature of evaporator is low, and air temperature is high, medium water element grain meets air to condense into drip on evaporator, and the material such as the small nap on the dirt in air or dress, seat, adhere to easily the surface in condenser, bring about thereby mildewy, the bacterium can breed in great quantities. Such air is sucked for a long time by human body what reach the person that take a car into meeting influence driver is healthy, so air conditioning system should change regularly core of air conditioning filter, clean air.
7, the windscreen when sprinkle is blown sordid
Breakdown decides: Safeguard kind of breakdown
Case study: Wiper is not used to feel pretty good when rain falls very greatly, when but become,sprinkle starts wiper, can discover wiper to be able to stay on vitreous face wipe not all trace; Some moment can get stuck to cause the line of sight on glass undesirable. This kind of circumstance makes clear wiper piece sclerotic already. Wiper is the rotational energy that borrows electromotor, rely on pitman change to become the exercise that will be gone to, communicate this active force to wiper arm. Not when the balata part of wiper is sclerotic, wiper cannot as close together as vitreous face joint, or wiper piece had bruise to be able to be caused wipe those who go up is inhomogenous, form rudimental bilge. Wiper or wiper rubber replacing one-sidedly very simple. But should notice when change, differ in model and a particular year, the installation method of wiper and length are different. Of some wiper film change very simple. But should notice when change, differ in model and a particular year, the installation method of wiper and length are different. Some wiper need to change only oak film, and some wiper need whole to change.
8, car has noise
Breakdown decides: False breakdown
Case study: The noise issue that no matter be high-grade car, cheap car, entrance car, homebred car, new car, old car,is put in different level. The noise inside the car basically comes from 5 respects such as noise of engine noise, resonance of wind a confusion of voices, automobile body, suspension and fetal sound. In car travel, engine high speed runs, its noise passes wall of firewall, bottom to wait pass into a car inside; The automobile body resonance that the car produces in travel of bumpy road surface, or the car window of the open when high speed travel cannot produce resonance to be able to make noise. Because the space inside the car is cramped, noise cannot be absorbed effectively, bump each other still can be sometimes inside the car produce resonant phenomenon. In travel, the noise that the suspension system of the car produces and the noise that tire produces can pass chassis pass into a car inside. Suspension means the brand of different, tire decorative pattern of different, tire the noise of different generation also distinguishs different, tyre pressure somewhat; Automobile body species is different reach travelling speed to differ, the volume of wind a confusion of voices that its generate is different also. Be in usually, travelling speed is higher, wind a confusion of voices is bigger.
9, temperature of the engine in moving is abrupt and exorbitant
Breakdown decides: True breakdown
Case study: If the car is in moving process, cooling fluid thermometer indicates the place that reachs 100 ℃ very quickly, or when cold car is started, temperature of engine cooling fluid lifts quickly to boiling, turn after complemental cooling fluid it is normal to be, but engine power drops apparently, show occurrence trouble of engine machine system. The cause that causes this kind of trouble is mostly: Cooling department is serious and slack; Isolation water covers the air cylinder mat with air cylinder to be developed bad; Thermostat advocate valve falls off; Fan drive belt loosens or rupture; Water pump axis and impeller loosen; Fan clutch job is bad.
10, indicator light of pressure of the engine oil when the car is quickened can illume
Breakdown decides: True, false breakdown coexists
Case study: Engine oil lamp illumes have fact and theory two kinds of circumstances. Alleged fact, it is engine oil pressure really low, low issue admonitory rate to indicator light, explain lubricant system has trouble truly, must give eliminate. So-called theory, positive-appearing image suspects in that way, engine oil is lubricant the system does not have breakdown, however system of indicator light of engine oil pressure produced breakdown, illumed erroneously indicator light. Although this kind of breakdown won't affect the regular job of engine, but also should find source in time, eliminate had better. The possibility of true illness below the circumstance is normally larger, should regard judgement as the main train of thought of breakdown.
11, car appears when high speed travel whole vehicle shakes phenomenon
Breakdown decides: True breakdown
Case study: When car is controlled to 96km/h in normal travel, appear whole vehicle shakes phenomenon, reduce speed, the phenomenon disappears namely, when if be quickened again,be being controlled to 90km/h, shake appear again breakdown of existence of demonstrative car batholith. Its breakdown reason has: Tire dynamic balancing is broken accurate; Around suspension, change direction, the orgnaization such as transmission becomes loose; Front-wheel drive fixed position, wheelbase is broken accurate; Axle shaft gap is too big. Above all, tire breaks accurate meeting to make the wheel rolls the edge beats repeatedly evenly travel, this is the main reason that causes whole vehicle to shake. Next, suspension orgnaization, change orgnaization, main transfer machinery to Song Kuang, become loose, cause wheelbase of toe-int value, car to break accurate, leaf spring is too soft, bring about car to produce resonance in travel, cause whole vehicle to shake. Again, axle shaft gap is too big, after making, change irregular motion is made in travel, wear away aggravate, cause rotate quality is lopsided, cause whole vehicle to shake. If above breakdown is not seasonable eliminate, will bring about vicious circle, cause other trouble.
12, when the car turns, those who turn to Pan Mingming to turn is big turn to become however small turn, turning to what Pan Mingming turns is small turn to become again however turn greatly
Breakdown decides: True breakdown
Case study: These two kinds of phenomena that when changing direction, produce are former call inadequacy to change direction, latter calls oversteer, the specification turns to systematic occurrence issue. The person that drive changes one side to the feeling when circuitous one side quickens in the car is: The car that has inadequacy to turn to function advances outward flank, the car that has oversteer property advances inward side. When travel radius greatens, call inadequacy to change direction. When travel radius decrescent, call oversteer. Still one kind turns to a phenomenon, it is inadequacy changes direction at first, halfway becomes oversteer again, quick and inward side changes direction. This is the most dangerous changeover to the phenomenon, send make trouble reason easily. This kind of circumstance just happens on the car in individual postposition engine only.
13, engine cold car starts difficulty, the engine after starting is oscillatory, tend next smooth, the engine when low speed begins to shake in, high speed is improved from time to tome
Breakdown decides: True breakdown
Case study: The likelihood is sparkplug breakdown or ignition hour premature. If not be the breakdown of sparkplug, can be being judged is ignition hour premature. If ignition hour is premature, in the instant of electric spark thrill through, the piston is far from top dead centre, the pressure that air mixes inside air cylinder and temperature are not high, cause blaze to form slow, and speed of the transmission after blaze is formed is inferior also, in this process, the further from sparkplug one part inside firebox mixes gas to still do not wait to be transmitted to sparkplug place ignite, because already lighted the temperature radiate of mixture gas to reach,expand and automatic upblaze, cause deflagrate, deflagrate shake when the low speed in causing engine to be in serious. Appear when afore-mentioned breakdown, should arrive in time repair a factory to undertake repairing.
14, engine movement is not smooth, constant companion has " dash forward, dash forward " sound, power of the engine when quickening is insufficient, often give out " Peng, Peng " blowout sound, vent-pipe risks black smoke
Breakdown decides: True breakdown
Case study: It is carburettor and platinic breakdown or ignition hour likely too late. If ignite hour spends evening, engine piston is apart from when top dead centre is very close, sparkplug just begins light a fire, lag of mixture gas combustion, combustion is not complete, when be opened to exhaust valve even after piston be issued to lower levels mixture gas still is in combustion, the lag of the amplification of firebox cubage and gas expands, cause air cylinder pressure not tall, engine power drops. The mixture gas that partial combustion expands returns carburettor possibly still through inlet valve, produce temper phenomenon, give out acuteness " Peng, Peng " sound, the mixture gas with not complete combustion appears by vent-pipe black smoke. Appear when afore-mentioned breakdown, should arrive in time repair a factory to undertake repairing.
15, when winter low temperature, car place time grows, it is relatively difficult that engine starts
Breakdown decides: False breakdown
Case study: Because air temperature is low, the aerification rate of fuel falls, mixture air becomes rare and not easy combustion causes starting difficulty. At the same time because air temperature is low, engine oil viscosity greatens, engine movement obstruction increases and cause starting difficulty. Additional, the chemical response of accumulator electrolyte is slow, the n inadequacy that causes the output when starting, starter power inadequacy and ignition voltage are insufficient, make engine starts hard. So, warm-up should undertake to engine first before the season in chill starts the car. Hot water of the perfusion in can be being covered with water to radiator or steam, the temperature in using water to cover is conducted to air cylinder wall, the fuel in air cylinder is being entered when making start easily aerification, can raise the temperature that can burn mixture gas, burn with convenience Yu Ran. Still can undertake warm-up to accumulator according to need in order to enhance the n of accumulator, heighten starting electric current and ignition tension.
16, the car changes direction when empty wagons and burden travel dish all swing, and on flat road surface travel swings more serious.
Breakdown decides: True breakdown
Case study: Because toe-int does not accord with technical standard and head of ball of horizontal straight pull rod,be commonly, turn to machine interior to cooperate clearance to had worn away big or change direction machine is fixed bolt becomes loose, turn to a section to sell had worn away with lining big be caused by. The synthetic moment of force that the Song Kuang that afore-mentioned reasons cause forms, can drive change direction or so dishes swing.
17, the car encounters breakdown to be caused namely when travel change direction dish swing, and swing when loaded vehicle more serious
Breakdown decides: True breakdown
Case study: Because front-wheel drive tire wears away,be usually not all, use the tire that fills newly or mat embryo to all do not reach steel group to be out of shape be caused by. Because, when wheel rotate speed is faster, drive gets lost dish of spiral moment of force to basically come from what encircle at converting embryo or steel to slant place degree. Place when what tire or steel encircle when difference exceeds 3 Mm, slant place moment of force can drive gets lost or so dishes swing. Should go repairing factory examination, inspect affection to change turn embryo or steel group.
18, in travel of the high speed on good road surface, change direction when heavy, empty wagons dish all swing, swing when loaded vehicle serious, and speed is faster, swing more serious
Breakdown decides: True breakdown
Case study: Because beat of apply the brake and hub join bolt become loose,be commonly, loose free from worries of hub bearing aperture and apply the brake rouse boring deviate center and make ply of beat of apply the brake differ, produce lopsided quantity be caused by. Because, below the circumstance of high speed travel, wheel rotate speed is very fast, drive gets lost dish of wobbly moment of force to basically come from the whirl at beat of apply the brake and hub uniformity and its counterbalance, below the action of lopsided quantity, inertial all produce drive to turn to dish of swinging moment of force with pitch horn.
19, when the pine adds up to clutch some shake
Breakdown decides: True breakdown
Case study: Demonstrative clutch dials forked, detached bearing, platen to reach grind piece wear away badly, auxiliary transmission does not have oil, transmission shaft extension forward shrinks after set reach its bearing to wear a flower badly, grind black, oil seal of auxiliary transmission rear cover already was burned sodden. The cause that creates afore-mentioned situations can have two only, one is the fixed position between transmission axis has a problem, cause an axis rough travel; Another is his the gap between the axis is too big.
20, radiator of to turn on builds discovery to always a few oily be soiled hang go up in surface, and discovery changes engine oil from time to tome moisture
Breakdown decides: True breakdown
Case study: Engine has system of two systemic circulation, one is cooling fluid circulatory system, another is lubricant circulatory system, each other of two old systems not be well versed in. If water is medium,is water in oil, the place of a certain segregation in showing two circulatory system appeared problem. "Oil drank water " with " water received oil " the breakdown that is two kinds of different property. Once engine runs, engine oil pressure always is pressure of prep above cooling water, accordingly engine oil enters cooling water very easily from inside cylinder body crackle in, contrary, cooling water enters engine oil not quite easily in, so engine oil enters is to belong to in water inside leakage phenomenon: The some position of passageway of cylinder body engine oil produces crackle, engine oil passes crackle space by " crowded " received cooling water channel in, because oil is lighter than water, radiator builds to turn on to be able to discover surplus is fat. And engine oil is hydrous it is the problem that attributes another property, as a result of,it is cylinder bushing burst or reason of other external world, refrigerative water enters engine oil of interfuse of oily base case in. Accordingly, "Oil drank water " it is engine airframe itself gave trouble, and " water received oil " more engine a replacement is caused, its breakdown property is different.
21, the car engine that buys newly shakes serious, sometimes breakdown indicator light still is met ablaze now and then
Breakdown decides: False breakdown
Case study: Certain new car can have this kind of case, car engine shakes serious, sometimes breakdown indicator light still is met ablaze now and then. Suspicion of a lot of people is problem of car existence quality, actually real reason is not clean fuel the pollution that caused the system that offer oil or jam. At present a few advanced car deployed tail gas to arrange the system that monitor, because this kind controls a system to detect very can acutely,car tail gas is discharged and fuel cleanness state, use feculent fuel to be able to cause fuel so supply, ignition, discharge systematic pollution, bring about engine trouble indicator light to illume to shake with the engine of different level then. So effective means of settlement is: After the system that complete cleanness is polluted, the benzine that adds index performance stability continuously adds mensurable oil path cleaner, the circumstance can be improved.
22, of electric car window litre fall speed each door are different
Breakdown decides: False breakdown
Case study: Because glass rises,be commonly fall a few sand and dust were entered in orbit, make the attrition obstruction between glass and groove greatens, produced this kind of result then. This is not the question with too big what, should make be cleaninged accordingly can solve a problem only. The proposal undertakes operating to professional maintenance station, if think oneself start work, the balata that should choose major cleans an agent. Because there are a lot of balata weather strips all round electric car window, if choose cleaner undeserved, can corrode to rubber products, make sealing strip degenerative, weather-shack, lose the effect then, the sealing of car window drops.
23, the car hangs automatic transmission D when, the car has slight vibration
Breakdown decides: False breakdown
Case study: When car prepares to start, hang D archives when automatic transmission hind, change in hydraulic quadrature implement below action, first gear grinds a joint, produce forward driving force, and prevented this kind of forward force because of stepping on footplate of next apply the brake right now, cause the slight vibration of the car. If vibration is too big, the friction that is transmission advancement archives likely piece wore away, need overhauls transmission; Still be engine is propped up or automatic transmission sustains mat damage likely, engine of generation resonance Su is short of fire to cause. So, should notice at ordinary times car condition, so that can seasonable discovery is unusual.
24, the engine oil of engine just changes to blacken before long
Breakdown judgement: False breakdown
Case study: Blacken the reason basically has two sides. It is the action as a result of kosher and dispersive agent above all, because use medium engine oil to be oxidized,be next. If in use of a kind of engine oil is changeless black, explain this kind of engine oil did not produce its normal clean effect at all. Current engine oil contains kosher and dispersive agent commonly, absorb the oxide of the carbon deposit that combustion produces and engine oil, so that be changed when oil change, make sure engine interior is clean thereby. So, because engine interior is too dirty,the engine oil that just changes blackens is not certainly cause, should press formulary time oil change only can. Attention: Must change engine oil and engine oil filter on schedule (or filter core) . After engine oil uses period of time, the viscosity of engine oil becomes stiff and acidity child arises, be like nonsked change will damage motor component, influence engine runs normally.
25, instruction sheet of pressure of engine engine oil shows unusual
Breakdown decides: True breakdown
Case study: When the finger of the watch shows oil pressure is abnormal, explain motor component has trouble. If oil is expressed,be appearance finger indication wave motion is big, because lubricating oil pump wears away,the likelihood is big, filter is shown by buy of mesh of dirty content block, oil absorption air of the interfuse in low, oil path and pressure watch have side of fat face, engine oil fluid the reason such as breakdown causes. Additional, lube viscosity on the low side, oil path is sealed with lubricity super-cooling of poor, lube sticks greasy filth of degree of too big, lube deposit is too much wait to also can cause instruction sheet of engine oil pressure to show unusual.
26, wastage of engine engine oil is too big
Breakdown decides: True breakdown
Case study: Attentive friend can discover, lube also exists to be used up normally below good in car condition fine case, but a little when car condition is poorer, the blue smoke of tail gas eduction of the car, actually this has been used up with respect to imply lube big, generally speaking, of lube use up no more than two kinds of circumstances, enter firebox to participate in combustion, or it is engine oil leakage. engine oil can change enters firebox, because component wears away badly,basically be, cooperate clearance too big, or engine oil pressure is exorbitant, bring about the change on engine oil to enter firebox. And because gaskets hardens,the leakage of engine oil basically is ageing, valve gets stuck dead. If be old old car, put in the circumstance with sealed and lax as a result of ageing gaskets commonly. Encounter above situation, you had better be the conserve center that passes major, undertake deciding by conserve engineer, carry out effective settle way.
27, spent one part through engine oil of engine of period of time
Breakdown decides: False breakdown
Case study: National level sets, the quantity of normal loss engine oil of 10 thousand kilometer should be in car travel 1L less than. The engine oil capacity of average car is controlled in 4L, achieve MIN of graticule of engine oil feet when face of engine oil fluid when place, engine oil has not lacked 0.5-1L. If the car is inside 10 thousand kilometers,engine oil loss attributes normal loss in 1L less than, cannot consider as breakdown.
28, the blowhole on crankcase jams
Breakdown decides: True breakdown
Case study: When engine works, total meeting has one part to be able to be lighted the clearance of amiable crock wall enters gas and ring of piston of waste gas classics inside crankcase. After entering the fuel steam inside crankcase to condense will attenuant engine oil, the acidity material in waste gas and vapor will eat a part, make engine oil performance varies, make engine oil loses its effect gradually. Additional, enter the gas inside crankcase to make the temperature inside crankcase and pressure all lift, cause engine oil from oil seal, the place such as mat is oozy. As a result of the reciprocate of the piston, the aeriform pressure inside crankcase ignore tall ignore low, affect the regular job of engine. Serious when the change on the engine oil inside meeting crankcase is overspread to firebox and air cylinder lid inside, still can be in leakage oil from the aperture that cheers mouth or engine oil feet. Appear to avoid afore-mentioned conditional phenomena, drafting apparatus is set on engine, with balancing crankcase inside, outside baric. The discharge outside if appear,burning face of joint of edge of engine oil, engine oil, engine oil is premature in using metamorphism and engine idle fast movement is not smooth when waiting for a phenomenon, should check crankcase drafting apparatus effective, should make sure blowhole is expedite. And negative pressure a powerful person piece cannot be out of shape, adhesion or outfit are wrong, breathing tube cannot be bent fold or jam, one-way a powerful person cannot be installed instead.
29, the body of solar term door of engine and idle fast electromotor is dirty
Breakdown decides: True breakdown
Case study: At present the engine idle of the car fast it is to rely on to install in idle of Pi of body of solar term door fast pace is controlled into electromotor. When engine moves, because air pledges the quantity reachs the reason of benzine character, fast a powerful person accumulates the throttle that can create system of door of engine solar term and idle have a lot of dirt, when bilge is serious, engine will appear idle fast too low, stability is differred or do not have idle fast, door of the solar term when cheering has hairpin appearance. So, the car is commonly when left and right sides of every travel 20000km, the proposal cleans system of solar term door. After cleaning, answer to achieve regular job status through diagnosing what appearance set engine makes.
30, car is urgent when quickening, speed is carried do not rise
Breakdown decides: True breakdown
Case study: In car travel, it is normal that the car when delay is quickened is quickened, urgent the speed when quickening cannot rise instantly, cannot overtake. Possible reason is the breakdown of fuel supply system of engine, hour of quantity of oil pressure, fuel injection, ignition nots agree with add up to a standard, sparkplug reachs breakdown of high tension line. Real case: A car is put in afore-mentioned phenomena. Do an idling to be added urgently to engine return an experiment, did not discover unusual. Examine the fuel supply system of engine, quantity of its oil pressure, fuel injection very normal, reading shows according to flowing breakdown is fastened in ignition. The examination ignites when up to specification, change after sparkplug, breakdown as before. Final examination affirms is scintilla of the high pressure when high speed not quite strong. With avometer tall block archives measures the resistance of each crocks of high tension line, all be in 25 Ω . Because the engine when high speed, big negative charge requires very strong ignition energy, and resistance of central high tension line is too great, cause ignition energy attenuation, high-pressured fire is weak, cause engine to quicken thereby faint. After changing a new high tension line, trouble removal.
31, hot car starts carburettor car engine not easily
Breakdown decides: True breakdown
Case study: If engine heats up car condition to start not easily, this namely system of automatic block air door appeared breakdown, air door cannot be opened automatically or creating block is cannot open completely. Car is when travel, because solar term door opens,spend bigger, because this is below great inlet pressure, empty air current pounds the block air door of deviate center axle, make block air door right now can a standard-sized sheet, but in engine low speed or idle fast season valve leaves degree very small, inlet pressure is not consequently great, right now block air door can is in only ajar perhaps open degree of very small state. Below the action of block air door, the mixture energy of life that enters air cylinder is stronger, if engine quits movement right now, block air door will be shut, when waiting for recrudesce to use motor, too strong mixture energy of life enters air cylinder to make sparkplug wet, make engine very difficult start. When encountering this situation, can adopt will quicken footplate to walk entirely, block air door and a standard-sized sheet of solar term door, rotational starter, through inspiratory fresh air too will thick mixture is enraged diluent, make engine starts. When sparkplug when serious adj/LIT wide is wet, detachable next air, but important is to should repair a factory to find out block air door cannot the reason of a standard-sized sheet.
32, car risks black smoke in the vent-pipe when travel of the high speed in travel
Breakdown decides: True breakdown
Case study: Usually, car risks black smoke when medium, high speed is he drive enter what be aware of not easily. Nevertheless, can use computational fuel wastage to decide. Carburettor engine is main by the following 4 kinds of reasons cause: Oily plane is exorbitant, create mixture energy of life too thick; Vacuum saves oil implement malfunction, those who cause impropriety add rich mixture; Advocate canal of foam of empty tolerance aperture jams; Air filter jams. Should above all filter of procuratorial work air whether does filter core jam. If jam, black smoke can be discharged when high speed, dynamical sex, economy is exasperate, should change right now air filter core. Check carburettor next, afore-mentioned operations need professional staff to undertake. Still have even if want to undertake whole detects to ignition system and engine.
33, when winter, the scuttle of car cannot open
Breakdown decides: False breakdown
Case study: In winter, in the car of the park outdoor, because the temperature inside the car causes head day higher in the evening,wave fall in the ice and snow all round scuttle to dissolve, and after of the previous night, the integral temperature of car is reduced, dissolved slush condenses into ice, so, make scuttle glass and fluid sealant casing freeze extremely easily. If open scuttle to make scuttle electromotor and balata sealing strip damage easily forcibly, because this should wait for the temperature inside the car,rise scuttle is opened again after affirming defrost. Same, when winter washs a car, although heat up bath car to be like not complete rub-up, car remains in brim of travel culmination window moisture also can freeze, scuttle should be opened after washing a car so, so that wipe all round moisture. Additional, surface of scuttle sealing strip passes spray paint or flocking processing, live to avoid to freeze, spray paint treats gum had better wipe with soft cloth, besmear again go up some of French chalk. And flocking treats gum wipe can, do not stick on smeary.
34, when changing direction heavy and arduous
Breakdown decides: True breakdown
Case study: The reason has the scroll bearing that changes a department to each place and sliding bearing to be tightened too, bearing is lubricant and undesirable; The ball head that turns to vertical pull rod, horizontal pull rod sells tone to must pass to tighten or be short of oil; Turn to axis and bushing to bend, cause calorie of sluggish; Front-wheel drive toe-int is adjusted undeserved; Front axle car or frame bend, be out of shape. Turn to round of tire additionally short energy of life, four-wheel fixed position data forbids to also can be caused change direction heavy.
35, of the car when travel change direction dish be hard to operate
Breakdown decides: True breakdown
Case study: The front-wheel drive norms that may be two side or atmospheric pressure are abhorrent; The front-wheel drive of two side advocate obliquitous or wheel extroversion horn is unequal after selling; The clearance of bearing of front-wheel drive hub of two side is abhorrent; The leaf spring arch of two side is spent or bounce is abhorrent; Wheelbase of or so two side has differred big; Wheel brake clearance passes small or beat of apply the brake breaks a circle, cause hairpin of a side brake, make brake pulls sluggish; Car lades inhomogenous etc.
36, the traffic when travel gets lost " hair wave "
Breakdown decides: True breakdown
Case study: Often be by the front-wheel drive in travel " place a head " those who cause, the reason has: Mat filling tire or car are repaired cause work of front-wheel drive assembly to be destroyed evenly; Transmission shaft assembly has a spare parts to become loose; Dynamic balancing of transmission shaft assembly is destroyed; Vibrating absorber invalidation; Leaf spring stiffness is abhorrent; Turn to department parts to wear away lax; Front-wheel drive calibration is undeserved.
37, common can normal travel, but be in sometimes slow when jockeying, have the feeling of urgent apply the brake, start to delay sluggish move from time to tome; Oily bad news is bigger when high speed, speed suffers be restricted.
Breakdown decides: True breakdown
Case study: Breakdown may go out to go up in total pump of apply the brake. Real case: Have emersion of a car afore-mentioned phenomena, raise the car case, tear open check guide of pump of cent of each brake, apply the brake, caliper and hand brake pull a line to wait, did not discover unusual. Undertake the road tries to also did not discover unusual. Spent period of time, afore-mentioned breakdown appear again, falling without circumstance of apply the brake push do not move. Feel hub two rounds with the hand, apparent overheat. After the join bolt of will total pump and vacuum booster is loose, apply the brake removes. The car can be driven. Will total pump is torn open below, measure length of booster ejector pin and depth of total pump piston with the tool, discovery is both without clearance. This makes total pump answers oil not complete, generation apply the brake pulls sluggish. Add between total pump and booster after fill up and adjusting good space, assemble second-round exam car, trouble removal.
38, the engine in travel has deflagrate noisy, when be being quickened especially apparent
Breakdown decides: True breakdown
Case study: Deflagrate noise is similar of spiracle lever resound through sound namely " noise made in coughing or vomiting of noise made in coughing or vomiting " sound. Because new-style engine uses hydraulic pressure to hold out column mostly, won't produce spiracle lever clearance to cross big noise, actual it is one kind deflagrates sound. This kind of noise is much because used be caused by of low grade fuel. Want to remove this kind of trouble, must more the high grade fuel that accords with a requirement. This kind of abnormal knocking is cutting Nuo radical car to go up the most apparent. If cannot buy the fuel that accords with a regulation temporarily, answer ignition when undertake be adjustmented appropriately.
39, engine hydraulic pressure holds out column noise
Breakdown decides: True breakdown
Case study: Install the engine that holds out column with hydraulic pressure, do not need to adjust spiracle clearance, but because hydraulic pressure holds out column,other factor is affected, also meet discrepant noisy happening sometimes. In engine idle when fast movement, in engine hydraulic pressure of mid, valve holds out column side to be able to be heard " Ka Da " noise. Noise rule is not clear, abate or the noise after increasing engine rotate speed is mixed and disorderly, disappear when high speed. Cold car is more apparent, heat up car noise wear off. If stop igneous test, noise still exists. This kind of noise allows easy miscarriage of justice, consider as the metallic knock of other position sound by accident namely, because this causes the reader's attention. Producing hydraulic pressure to hold out the reason of column abnormal knocking is, force plunger wears away, valve leakage oil, supply holds out pressure of post engine oil insufficient, force plunger and hold out cylinder by smeary block. When removing trouble, to wearing away, the spare parts with leakage serious oil should give change. Wear away smaller part can continue to use through repairing.
40, vacuum glue canal has flat reputation
Breakdown decides: True breakdown
Case study: In use, because vacuum glue is in charge of ageing to become loose, fall off reach be out of shape, in idle when fast movement, engine upside can hear a kind " whistle whistles " flat sound, as rotate speed rise, sound disappears gradually, noise of cold machine, heat engine is invariant. In the meantime, engine is in idle when fast movement, return companion to have " dash forward dash forward " noise, some accessory are spent because of vacuum insufficient and do not work, although noise is small, but have hidden trouble. Because vacuum glue canal becomes loose,afore-mentioned breakdown reasons are, after falling off, because start machine movement to produce vacuum, have in place of vacuum tube connect bigger inspiratory and the sound that produces air stream. The method that eliminates this kind of breakdown is simpler, check each vacuum hose, pipe fittings place to have be out of shape without ageing, chap, fall off, if have damage,should change new.
41, wheel circle is nigrescent
Breakdown decides: False breakdown
Case study: The reason with wheel nigrescent circle is brake is when apply the brake, mutual attrition grinds caliper of apply the brake and car turntable pink of below a few charcoal, pink is like these charcoal to keep clear of not in time, the aluminium alloy because of the wheel annulus the circle also can give out heat, these quantity of heat cause charcoal pink to be in aluminium alloy annulus group appearance knot is anxious, became the hard surface layer of a deep coffee, use water to always cannot be dropped. Because of front-wheel drive apply the brake when, reach of car centre of gravity, all weight are centered toward car head, burden of the apply the brake before causing is heavier, this is front-wheel drive brake what grind the charcoal pink that come down to compare the reason with a lot of more rear wheel, want to avoid such appearance, be about diligent rinse round of circle.
42, drive the car of same brand, why the car of others burns oil little, and oneself car burns oil however much
Breakdown decides: False breakdown
Case study: Above all, the car is in uneven, the oily amount that place of the travel on the force of flatter than be in magnanimous and smooth attrition is small road surface on the road surface with slope steep much turn spends wants much; The car is compared in sanded, earthy road surface pledge in cement, asphalt oil of cost of the travel on road surface wants much; The car is compared in downtown travel want in oil of suburb travel cost much. Downtown road besides complex, the car often encounters traffic jam again, speed is inferior, and suburb look is better to road condition, the car can maintain economic rate travel. Next, often should check status of circumstance of change of air cylinder pressure, sparkplug job circumstance and fuel system work, the mixture concentration that whether engine chose ideal and proper ignition shift to an earlier date horn, how much these are decision car oily bad news is crucial.
43, before the mist since windscreen winter
Breakdown decides: False breakdown
Case study: Drive in the winter car, especially when a few people just got on a car, before windscreen inside has fog easily and affect the line of vision, although be brushed ceaselessly, or ceaselessly misty, special effect drive a vehicle is safe. Below introduce fast demist and the method that defend mist simply: Air conditioning switch can be opened when fast demist, will give blast tuyere to choose knob to arrive the position of the windscreen before blowing, shut or reduce 3 above to give wind gap, adjust wind force knob to turn to proper place. If outside air is dry, air is good, should choose from energy of life is taken outside the car, can choose loop of the air inside the car conversely. Turn thermoregulation knob to proper place, make the temperature inside the car feels comfortable. Glass prevents mist to use appropriative glass to prevent mist agent, supermarket or shop of automobile articles for use have carry out, the price is not expensive also, the effect is very good. If do not have appropriative glass to prevent mist agent, the vitreous lotion that also can use housekeeping money or abluent will replace, it embellish is wet brush cloth neatly, those who wipe windscreen inside the surface, after wiping glass clean again, also can rise to defend the action of mist.
44, when slope road jockeys, sometimes " P " archives position speed change cannot be moved
Breakdown decides: False breakdown
Case study: Sometimes car jockeys in slope road hind, when starting engine again, appear " P " archives position archives the phenomenon that cannot move. Because we are general,this is when jockeying, be to step on hind of apply the brake first, archives lay " P " archives position, after raising footplate of apply the brake, because,car is met self-prossessed shift, bring about the mechanical lock inside transmission to stop " ungual " card getting power is inside ungual chamfer be caused by, cause appear move archives when arduous feeling. This is not breakdown, accurate operation method can avoid this kind of circumstance to appear. Namely: Step on footplate of apply the brake, place gearlever in P archives, pull a hand to use brake, raise footplate of apply the brake next.
45, fog has inside headlamp
Breakdown decides: True breakdown
Case study: There is one on the rear cover of headlamp plastic or be rubber breathe freely passageway, this passageway must exist on the structure of headlamp, heat up bulgy gas to cannot eliminate otherwise, this breathes freely the passageway can give gas to cannot drink water only. If have slight appearance having fog, after classics air circulates or attending a meeting headlamp to drop off very quickly, if have water or fog from beginning to end,come loose to be not dropped need to go to factory of professional vehicle maintenance and repair eliminating.
46, car walks rough road surface or it is to pass decelerate segregation to take from time to tome " creak " noise
Breakdown decides: False breakdown
Case study: Usually, no matter new car still is old car, walk along rough road surface or be all right when through road decelerate segregation is taken, can have " creak " noise. New car voice will be a few smaller, old car will be a few older, this is not breakdown. Because current car used independent suspension structure,this is, connective place is decreased to come true brace up used balata, when car vibration reachs certain level, because of balata be out of shape and sound, compare Xiaoshi when oscillatory extent, the sound that give out is relatively lesser.
47, the footplate when stepping on clutch appears slight " Zhi Zhi " sound
Breakdown decides: False breakdown
Case study: When some car are stepping on clutch pedal pad, always can give out be similar to " Zhi, Zhi " sound, it is bored very, still thinking is clutch appeared breakdown, because because long-term use appears to wear away slightly,clutch pedal pad props up an axis,the occurrence of this kind of phenomenon is be caused by, handle paint in the axis that prop up commonly a few lubricant are OK.
48, the fluid face inside grease cup of total pump of apply the brake as use reduce ceaselessly
Breakdown decides: False breakdown
Case study: A little attentive friend often clean, examination car. With respect to meeting discovery the face of brake fluid juice inside grease cup of apply the brake becomes low ceaselessly, this is not breakdown. As a result of,this is the use as car, make rotor wear away stage by stage attenuate, the brake fluid inside total pump grease cup enters apply the brake ceaselessly to divide pump, this is normal, after changing to make rotor newly, face of brake fluid juice can regain original height again.
49, step on footplate of apply the brake from time to tome slight " flat " sound
Breakdown decides: False breakdown
Case study: This is the noise that vacuum booster gives out. The pressure difference between the negative pressure that the working principle of supercharger of vacuum apply the brake is the generation when using engine to work and atmosphere will force diaphragm of the balata inside supercharger to move, drive apply the brake advocate the piston of the crock, will reduce the person that drive to step on the force of footplate of apply the brake with this. When stepping on footplate of apply the brake, engine is introduced into the negative pressure of gas manifold the both sides cavity of diaphragm, press equilibrium, so supercharger does not work, when stepping on footplate of apply the brake, the vacuum aperture of cavity of supercharger balata diaphragm is shut, open ventage to let outside air enter at the same time, because the atmospheric pressure inside antrum is more than the atmospheric pressure of another antrum, force balata diaphragm to move and drive shift of master cylinder piston of apply the brake, have pressure boost effect thereby.
50, when stepping on footplate of apply the brake, gearlever place has " Ka Da " sound
Breakdown decides: False breakdown
Case study: The car of automatic transmission has the function that prevents to operate gearlever by accident commonly, in order to prevent driver or because operate occurrence safety accident by accident,be the multiply member inside the car. So, be in " P " gearlever of footplate of apply the brake walking when archives position cannot be moved. Gearlever place has " Ka Da " sound is the sound that gives out when movement of electromagnetism a powerful person, every step on footplate of apply the brake, electromagnetism a powerful person can give out noise.
51, the quantity hour that clutch pedal pad steps on, the indolence when holding file is fast, still can appear sometimes the sound that the gear when putting into gear bumps
Breakdown decides: False breakdown
Case study: What the clutch of some cars uses is the type that draw a line. Clutch pedal pad can appear to become low gradually after should using period of time, distance of the feeling when stepping on clutch is short, the indolence when putting into gear is fast, still can appear sometimes the sound that the gear when putting into gear bumps. Because pull the fixed lock that the line adjusts to stop,this is nut increases as what step on frequency of clutch pedal pad, whorl rotates automatically those who cause. This is not breakdown, should rotate a little only fixed lock stops nut is OK.
52, when cheering, but speed cannot rise however,engine rotate speed lifts
Breakdown decides: True breakdown
Case study: In car travel when if discover car,be being quickened, especially urgent the car when quickening cannot lift as the rotate speed of engine and carry fast, use transmission to the hand and character, as a result of,be commonly clutch piece attaint causes. As a result of,the car of automatic transmission is commonly the attrition inside transmission piece attaint causes. Cannot quicken travel again right now, in order to avoid bigger pecuniary loss. Should seek help of ask for help or be drive car to maintain a factory undertake repairing slowly.
53, door glass is rising when falling, have slight " pull " sound
Breakdown decides: Safeguard kind of breakdown
Case study: Glass of occurrence door of the meeting after the car is using period of time is rising when falling, have slight " pull " sound. Of side of the person that drive especially serious. Because northward sand blown by wind is bigger,this basically is, classics regular meeting is mixed in door glass fluid sealant osculatory place is put left a few tiny speck and grit, cause glass to rise noise appears when falling. The fluid sealant that wants glass of seasonable and clean door at this moment with the sand and dust inside chamfer of slideway cloth with soft nap, meet otherwise cut door glass.
54, when safety belt calls in, do not freely
Breakdown decides: False breakdown
Case study: The conference after the safety belt of automatic rollback type of some car uses period of time appears to cannot call in in time after loose safety belt, general this is caused, want to did good cleanness to be solved only.
55, when turning to the lamp to illume, aglimmer frequency is compared fast at ordinary times.
Breakdown decides: True breakdown
Case study: After moving the handle that turns to the lamp, the turns to indication lamp to blink frequency on appearance dial is compared fast at ordinary times, this is breakdown. As a result of,be commonly of a side change direction after bulb is broken, because the resistor of circuit produces metabolic place,cause. The vehicle that becomes you appears when this phenomenon, must check in time change, in order to ensure traffic safety.
56, rotate speed of the engine when open of car air conditioning is indeclinable
Breakdown decides: False breakdown
Case study: When average car opens air conditioning, the rotate speed of engine rises somewhat, this is to satisfy the bear of air conditioning compressor to ask, the idle that carries engine fast stability. But, the engine that car of very much new fund configures, the engine when opening air conditioning does not increase rotate speed, the idle that relies on the fuel injection time that increases engine fuel injector to carry engine however fast stability. So, the engine when opening air conditioning is not carried fast not be breakdown certainly.
57, wind force of empty v a place with a draught is small
Breakdown decides: Safeguard kind of breakdown
Case study: The wind force of mouth giving wind of car interior appears in ahull of same fan rotate speed to measure the phenomenon of taper as the use meeting of car, the effect of refrigeration is abate also at the same time. General because a lot of new fund cars installed air conditioning filter,this is, the purpose of installation is to maintain car interior to achieve clean air, this also makes air conditioning evaporator maintains clean, achieve first-rate refrigeration result. The meeting after filter uses period of time is enclothed to cause permeability by dust place can abate, the wind force that gives wind gap subsequently also was reduced. Accordingly, should change only new filter issue was solved.
58, car back door cannot be opened from interior
Breakdown decides: False breakdown
Case study: Current car is in installation to children is locked up in the back door of car commonly, will prevent to take the child in backlash child stem from operate by accident make door is opened, occurrence safety accident. When a lot of people are washing car as a result of carelessly, moved the handle that children locks up, appear take the multiply member in backlash to be hit from inside do not open the door. This is not breakdown, the position that the handle that should open door to lock up children again next from the side outside car only removes is OK.
59, winter early morning sometimes door cannot open
Breakdown decides: False breakdown
Case study: When winter washs a car hind, the car that is put in open air often appears the phenomenon that door does not have a law to open, this is not breakdown, because wash the moisture that remains after the car to stay in the door,be child fluid sealant go up, adhesion be caused by is caused after water is frozen. If adhesion is not very serious, can adopt the means that pulls open door forcibly to open. If the case of adhesion is very severe, the fluid sealant that opens attaint door forcibly.
60, winter early morning sometimes door key cannot rotate
Breakdown decides: False breakdown
Case study: After winter washs a car, the car that is put in open air often appears the phenomenon that door key cannot rotate. This is not breakdown, cause, after the key inserts ward, the lock inside stops the orgnaization cannot bounce, occurrence key cannot be twisted move. Right now, must not be twisted energetically, can cause the damage of the key otherwise or be be out of shape and cannot use. Should adopt open of use remote controller door or it is the means that heats to door lock is opened.
61, automatic transmission car does not step on gearlever of footplate of apply the brake to cannot be moved
Breakdown decides: False breakdown
Case study: This is for a function of safety design, not be breakdown. Do not put through when ignition switch, footplate of apply the brake did not walk or unplug after ignition key, gearlever cannot from P archives exit. If need to exit, can press urgent pushbutton releases the gearlever that the lock decides. If gearshift photograph was not put in P archives, ignition key cannot turn to LOCK to lock up emplacement. When ignition switch puts through, must step on footplate of next apply the brake, ability gearlever from P archives change other file. Because direct annul must extend ability to make the lock removes surely, reason still needs to press at the same time the pushbutton on gearlever.
62, the car that contains ABS is when urgent apply the brake, appear " " noise
Breakdown decides: False breakdown
Case study: The car that contains ABS is when urgent apply the brake, appear " " noise, this is ABS the normal sound that executive pump gives out in decompression job process, in the meantime, still can accompany what footplate of apply the brake beats up and down to play crural feeling. When wheel apply the brake, installation can feel a wheel to whether be held in the arms dead instantly in the sensor on the wheel, send signal computer. To holding dying wheel in the arms, computer reduces the force of apply the brake of this wheel immediately, the wheel continues to turn again, roll arrives certain level, computer gives out a command to bring to bear on again apply the brake, make sure the wheel is not sent again already by apply the brake hold in the arms dead. Repeat ceaselessly so, till the car is complete,stop. Computer can be in a second between detect to what the wheel undertakes hundreds of times, undertake those who count 10 times operate to braking system all at the same time, nevertheless, the ability when ABS wants urgent apply the brake only is effective, what act well usually still is common brake system.
63, when winter drives warm wind before windscreen has fog, return companion to have sweet taste
Breakdown decides: True breakdown
Case study: This kind of phenomenon appears when the vehicle that becomes you uses warm wind, commonly leak is caused. The wind that the mirage on windscreen is generation of the air-blower inside the car before drives the antifreeze that collects leakage to blow an air channel, condense the be caused by on advanced windscreen, at the same time the person also can feel anti-icing the special flavour of fluid. Should put out fan right now, mirage can drop off gradually. But should maintain repair in shop in time to manage to major.
