If vehicle shake is found during driving, it is usually caused by tires. Because the wheel balance is not right and the vehicle deviates, you can choose to do dynamic balance. There are several cases of tire imbalance, one is due to the long-term deformation of the steel ring, and the other is due to the deformation of the transmission shaft.
Body jitter at idle speed
There are several reasons why the vehicle shakes when idling.
The engine has serious carbon deposition.
When there is too much carbon in the engine, it will cause idling jitter after cold start. This is because when there is too much carbon deposit, the sprayed mixed gas will be absorbed by the carbon deposit, and at this time, the mixed gas is too thin and it is difficult to start. At this time, the engine can only be stopped when the mixture reaches a certain level, but then the mixture in the cylinder will become rich because of too much carbon deposition. At this time, the engine will shake.
Ignition system problem
Problems with the ignition system can also lead to idle jitter, which is also due to excessive carbon deposition in the spark plug.
Oil pressure instability
If there is no problem of excessive carbon deposition and the body is still shaking at idle speed, it may be because there are problems with the fuel supply pressure and intake pressure sensors. When these two problems occur, it will also cause the body to shake at idle speed.
Aging of engine parts
The last case is that there is something wrong with the engine foot. The engine foot is simply the damping system of the engine. If there is a problem that the engine vibration cannot be filtered, it will naturally lead to the problem of jitter.
It may be that the engine is unstable. Clean up the carbon deposit.
Check whether the steering wheel is shaking, whether the heat exhaust fan is loose or faulty, and whether there are ball dragons and ball heads. You have to check and replace it, and do four-wheel alignment, or you won't be able to shift gears.
Check the engine rubber gasket, and check whether the engine rubber gasket and air conditioning compressor are loose.
If the idle speed is too low, it may be that the engine can't receive the air conditioner on signal, or the voltage of the air conditioner on signal is weak, so that the engine speed can't be increased to bear a large load. If the throttle valve is found to be too dirty or the fuel injector has too much carbon deposit, it should be cleaned in time. Engine pad aging, car jitter is sometimes related to engine pad aging. The engine foot is actually the shock absorption system of the engine, and the engine foot is responsible for absorbing the slight jitter when the engine is running. If there is something wrong with the engine foot, these vibrations will be transmitted to the steering wheel and cab, causing idling jitter. Engine jitter caused by load