What is the cause of a slight shake in the car after it is on fire?

If you find that the vehicle shakes badly after the car starts, it is an indication that the vehicle has an abnormal situation, and it is necessary to stop and check it in time to avoid more serious dangers.

1. It is inevitable that the engine will produce carbon deposits, but when the carbon deposits are too much in the engine, it will cause the engine to work poorly and produce different faults. When there is too much carbon deposit inside the engine, the gasoline sprayed out by the cold start fuel injector will be absorbed by the carbon deposit, resulting in the mixture of cold car start is too thin, making it difficult to start, until the gasoline absorbed by the carbon deposit is saturated, it is easy to get started, and the gasoline adsorbed on the carbon deposit will be sucked into the cylinder by the vacuum suction of the engine after landing, so that the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, causing idle shaking after the cold car starts. Workaround:

Clean the oil circuit and check whether the idle motor has carbon deposits and should be cleaned.

2. For vehicles below 3 cylinders, it is mostly normal when the vehicle shakes, and the 3-cylinder car itself shakes badly. If the vehicle with more than 4 cylinders, if it is more serious than usual, check whether there is any abnormal situation in the engine compartment, whether there is a cylinder that does not work or multiple cylinders work poorly, the common symptoms are that the spark plug is burned, the spark plug gap is too large, or there is a loose situation, the vehicle will shake, then stop and carefully check whether the spark plug is complete, and there are tools to remove the spark plug to check it. There is also poor oil supply, poor oil lubrication, etc., and you must go to the maintenance point in time to repair it if you can't get it yourself.

3. Sometimes the tire pressure is insufficient, or there is a problem with the balance, which can easily cause the vehicle to tremble, so it is necessary to carefully check the tire pressure to see if the tire has abnormal wear.

4. The clutch is separated and shakes unclear, and the cause of the failure.

1) The rear end face of the inner end of the separation lever is not in the same plane, the compression spring is uneven or individually broken, and the pressure plate has grooves.

2) The pressure plate and the driven plate are warped and deformed, the rivets of the friction plate are exposed, the surface of the friction plate is oiled, and the spline groove of the driven plate and the first shaft spline tooth of the transmission are seriously worn.

3) Loose fixing bolts of the engine suspension, transmission and flywheel housing, clutch cover, flywheel, etc., will cause the clutch to tremble at the start of the car.

Fault judgment and troubleshooting.

The engine is running rapidly, hang a low gear, and then slowly lift the clutch pedal to start, if the car shakes, it is the clutch shuddering.

1) Step on and lift the clutch pedal, check whether the separating bearing is flexible in advance and retreat, if it is astringent, it means that there is oil between the separating bearing and the conduit, and it should be cleaned.

2) Check whether the inner end of the separation lever is in the same plane, if not, it should be adjusted according to the regulations.

3) Check the fastening of the connecting bolts of each part, if there is any looseness, it should be tightened according to the specified torque.

4) Check whether the main and driven disc are warped and deformed, the friction surface is grooved and the friction plate rivet is exposed, if so, it should be repaired. Spring breaks should be replaced, and uneven elasticity should be arranged or replaced symmetrically.

If mine is helpful to you, remember to light it up, thank you!

The main cause of idle jitter;

1. The most common cause of car shaking is that the throttle valve is too dirty or the fuel injector has too much carbon.

2. When the carbon deposition inside the engine is too much, the gasoline sprayed by the cold start fuel injector will be absorbed by a large amount of carbon deposition, resulting in the mixture of cold start being too thin, making it difficult to start, in this case, only when the gasoline absorbed by carbon deposition is saturated, it is easy to get started, 3. After the car is adsorbed, the gasoline adsorbed on the carbon deposition will be sucked into the cylinder by the vacuum suction of the engine for combustion, and the mixture becomes thick, and the combustible mixture of the engine is dilute and thick, resulting in idle shaking after cold start. The lower the temperature, the greater the amount of oil required for the cold start, and the more carbon deposits will affect the smooth cold start.

Severe idle vibration is generally caused by engine cylinder failure, aging or loose foot rubber, carbon deposits, fuel system failure, etc.

1.Serious engine carbon deposits: Cars always have the problem of carbon deposits, including cylinder carbon deposits, throttle carbon deposits, spark plug carbon deposits, intake carbon deposits, etc.

When the engine has too much carbon deposit, it will affect the ignition energy, air intake efficiency and air-fuel ratio of the car, resulting in the unstable power output of the car, and the phenomenon of idle speed and acceleration jitter appears.

2.Unstable oil pressure: If you have cleaned the engine carbon deposits, cleaned the throttle, replaced the oil gasket and spark plug, etc.

And when idling, you still find that the body shakes, it is recommended that you go to the 4S shop to check whether the oil supply pressure and intake pressure sensor are normal, if the oil pump supply pressure is abnormal, or the intake pressure sensor value is wrong, and the work is not good, it will cause the body to shake.

3.Engine cylinder shortage: Engine cylinder deficiency mainly refers to the engine one or more cylinders are not working properly, which is generally manifested as:

The exhaust fumes coming out of the car are obviously intermittent, and the exhaust pipe shakes violently, and the engine shake can be clearly felt, sometimes accompanied by abnormal noises. This is mostly related to ignition coil failure.

4.Aging of engine parts: Shake in the car is also associated with the aging of the engine feet (also known as claw pads).

The engine foot is actually the shock absorber system of the engine. The engine feet are responsible for absorbing slight vibrations when the engine is running. If there is a problem with the engine base, these vibrations can be transmitted to the steering wheel and cab, causing vibrations at idle.

Workaround:The best way is to clean the oil circuit, clean it regularly, and use PNF fuel additives to solve the above problems caused by carbon deposits. The fuel quality is not very good or the initial fuel of the new car is stored for too long, resulting in a rapid increase in the colloidal composition of the oil circuit, which will continue to pollute the fresh fuel and cause no good fuel to participate in combustion in the later stage, and the carbon deposition exceeds the standard, which is especially common for China VI vehicles. We can only gradually alleviate most of the problems by maintaining clean oil circuits.

Hello, after the car starts, because it is idling, the speed is low, the movement of the engine piston is uneven, and the oil at this time has not been fully stirred, and the lubrication effect is not good.

There is also a possibility that the reason is the ignition time of the spark plug, the problem of insufficient combustion, and if it feels serious, go to repair it in time.

Hope it helps.

There are several reasons that can preliminarily rule out circuit problems, and the following two problems should be cleaned up to solve the jitter,1The throttle valve has serious carbon deposition, and the throttle is cleaned. 2.If the spark plug has serious carbon deposit, clean the electrode or replace it.

What you are talking about is what kind of weather is the fire, if there is a slight shaking in the cold day because it is too cold, it is a normal phenomenon, if it is not normal in the hot weather, see if the spark plug is normal.

The car is difficult to start, and the body shakes when ignition, what is the reason?

Ignition problems, air-fuel ratio problems.

Ignition problems: spark plug ablation or leakage, or the spark plug gap is not properly adjusted. The spark plug is a wearing part, used to a certain number of kilometers, generally need to be replaced, if there is a problem with the spark plug of a cylinder, it will cause the cylinder to burn abnormally.

Air-fuel ratio problem:

If there is too much carbon deposit, it will absorb a little fuel, so that the carbon deposit of the oil sprayed by the cold car is adsorbed when starting, and the mixing ratio is too thin, causing instability in starting. After the car is launched, the carbon fuel is released, resulting in an overly concentrated mixing ratio and an unstable mixing ratio, which of course will cause the engine speed to be unstable and cause shaking.

The EUC will control the mixing ratio and ignition angle according to some sensors, if there is a problem with the oxygen sensor, water temperature sensor, flow meter, pressure sensor, etc., or if there is a lack of antifreeze, the thermostat is broken, and the fan is faulty, it will also cause the air-fuel ratio to be incorrectly controlled and cause jitter.

The oil pump is broken, or the pipeline is blocked, resulting in unstable oil supply pressure, which will cause the proportion of oil supply to change, directly causing shaking.

The body shake after starting may be caused by unstable oil pressure, dirty throttle, excessive carbon deposits in the fuel injector and air intake, etc.

1. Unstable oil pressure, abnormal oil supply pressure of the oil pump or wrong value of the intake pressure sensor and poor work will cause the body to shake. Solution: Check the oil pressure and replace the parts if necessary.

2. The aging of engine parts and the shaking of the car are also related to the aging of the engine feet. The engine foot is actually the suspension system of the engine, and the engine foot is responsible for absorbing the subtle shake of the engine when it is running, and if there is a problem with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing shaking when idling.

3. The engine has serious carbon deposits, and the most common reason for car shaking is that the throttle is too dirty or the fuel injector is too much carbon. When there is too much carbon inside the engine, the gasoline ejected from the cold-start injector will be absorbed by the carbon deposit, resulting in a cold-start mixture that is too thin and makes it difficult to start.

Precautions for body shaking after starting:

1. The reason why the car will shake when it starts cold is because the vehicle needs enough energy to start to maintain normal operation, and at low temperature, due to the large resistance in the cylinder, the ECU of the vehicle will adjust the air-fuel ratio to the over-concentrated state by default, so the vehicle will shake back when starting.

2. The quality of gasoline is not good, the water temperature sensor is out of order, and there is a problem with the exhaust gas circulation valve, which will also cause the vehicle to shake. Therefore, when shaking occurs, you must not be careless, and you should check the vehicle in time.

The car is difficult to start, and the body shakes when ignition, what is the reason?

First, the idle speed is low; The second is that there is a cylinder that is not working properly or is not working.

Hello, this situation is caused by the lack of cylinders, the ignition of a cylinder or fuel injection, or the poor sealing will cause it to not work [there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Hello, according to the situation you described, it is because the engine is not working properly so it will lead to this reason, it is recommended that you do the maintenance of the oil circuit, throttle, and spark plug [If there is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

In the morning, when the car starts, there are reasons for a slight shaking:

1) The jitter caused by equipment failure, such as ignition coil, water temperature sensor, spark plug does not work, lack of cylinder, etc., does not work properly, this jitter is more obvious, sometimes it is directly like the shaking of the car, such jitter should be detected in the maintenance station, but for the occasional occurrence, even the maintenance station may not be able to find out the reason.

2) The shaking that can be felt in the car during the cold start and gradually from the inside of the car.

The jitter of the cold start may be due to the bad gasoline resulting in gasoline gelatinization, resulting in obvious shaking fault phenomenon of the engine during cold start, and it is beneficial to clean the oil circuit or add gasoline cleaner for a long time. It is recommended to change the steam filter, and then add special gasoline additives, which can ensure that the failure phenomenon caused by gasoline problems can be reduced.

If it is not serious, it is a normal situation, and if it is particularly serious, go to the garage to check whether the valve door and the engine need to be cleaned.

1. The positioning angle of the front wheel is inaccurate, and the toe is too large;

2. The air pressure of the front forum is too low or the tire is unbalanced due to repair and other reasons;

3. The front spokes are deformed or the number of tire screws is different;

4. The installation of transmission system parts is loose;

5. The transmission shaft is bent, the dynamic is unbalanced, and the front shaft is deformed;

6. The shock absorber fails, the stiffness of the front leaf spring is inconsistent, and the frame is deformed.

When judging, the drive axle is erected first, the front wheel is plugged with safety plug blocks, the engine is started and the high-speed gear is gradually shifted, so that the drive wheel reaches the final test vibration speed. If both the body and steering wheel shake at this time, it is caused by vibrations caused by the drivetrain. Because the front axle is in a stationary state at this time, if the final test vibration speed is reached, the car does not shake, the cause of vibration is the fault of the front axle part of the car;

2. Check whether the positioning angle of the front wheel and the front wheel meet the requirements, and if it is inaccurate, it should be adjusted;

3. Set up the front axle to test the wheels, check the static balance of the wheels and whether the tires are too deformed. If necessary, a good wheel can be changed for comparative experiments.

Hello, the car is on fire and shaking, divided into the following four types, the first, it may be caused by too much carbon deposition inside the engine of the vehicle, which makes it difficult for the vehicle to start, resulting in idle shaking, the second is that there is a problem with the ignition system of the vehicle, you need to check the spark plug and high-voltage wire of the vehicle, the working state of the ignition system is not operating normally, which will lead to this situation, resulting in the vehicle idling shaking or difficult to start, the third type, the fuel system of the vehicle oil pressure is unstable, The oil pump of the vehicle can not normally give the oil to the vehicle, resulting in poor atomization of the engine fuel injection, or can not open the fuel injector, resulting in the lack of cylinder jitter or can not start, the fourth, is the failure caused by insufficient engine cylinder pressure, because of the problem of time, the engine of the vehicle has exceeded the service life of the engine, so it can not continue to work, and there is the problem of intermittent shaking at idle speed, which should be repaired in time to enter the shop. The vehicle must be regularly inspected and maintained to prolong the service life of the vehicle.