Exhaust pipe jitter of Buick Excelle

The engine has a serious carbon deposit, and the most common reason for car jitter is that the throttle valve is too dirty or the injector has too much carbon deposit. 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 manifested by the obvious intermittent exhaust gas flow from the automobile, and the severe vibration of the exhaust pipe, which can obviously feel the vibration of the engine, sometimes accompanied by sudden noise. This is mostly related to the failure of ignition coil;

3. The engine combustible mixture is sometimes rare and sometimes rich, which leads to idling jitter after cold start. The lower the temperature, the more engine oil and carbon deposit are needed for cold start, which will affect the smooth progress of cold start.