What is the Jetta engine jitter?

The reason of Jetta engine jitter is as follows: 1. The most common cause of automobile jitter caused by serious carbon deposition in the engine is that the throttle valve is too dirty or the nozzle has too much carbon deposition. When there is too much carbon deposit in the engine, the gasoline sprayed by the cold start fuel injection head will be absorbed by the carbon deposit; 2. Engine lack of cylinder: Engine lack of cylinder mainly refers to the abnormal operation of one or more cylinders of the engine, which is characterized by obvious intermittence of the exhaust gas flow discharged by the automobile, serious jitter of the exhaust pipe, and obvious feeling of engine jitter, sometimes accompanied by sudden noise. This is mostly related to the failure of ignition coil; 3. The combustible mixture of the engine is sometimes thin and sometimes thick, causing idling jitter after cold start. The lower the temperature is, the more oil is needed for cold start and the more carbon is deposited, which will affect the success of cold start.