What is the reason for the idling vibration of the car? Performance and causes of engine idling knock

What is the idling vibration of the car? The manifestations and causes of engine idling knock are as follows:

1, the engine has serious carbon deposition: the throttle valve is too dirty or the fuel injector has too much carbon deposition, and the gasoline sprayed by the fuel injector will be absorbed by a large amount of carbon deposition during cold start, which leads to the lean mixture during cold start and the difficulty in starting, thus causing idling jitter after cold start;

2. Ignition system problems: Check the working conditions of spark plugs, high-voltage lines and ignition coils. Poor working conditions of ignition system and spark plug will lead to idle jitter;

3. Aging of engine parts: the engine foot is responsible for absorbing slight jitter when the engine is running. If there is something wrong with the engine foot, the vibration will be transmitted to the steering wheel and cab, causing idling jitter.

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