What is the reason for Guangzhou Automobile Chuanqi GS4 startup jitter?

The reasons for the start-up jitter of Guangzhou Automobile Chuanqi GS4 are as follows: 1, and too much carbon deposit on throttle, fuel injector and air intake may be one of the reasons. 2. When there is too much carbon deposit in the engine, the gasoline sprayed by the fuel injection head will be absorbed by the carbon deposit during cold start, which will lead to too thin mixture during cold start and make the start shake. 3, ignition coil, spark plug, nozzle and other mechanical failures, resulting in lack of cylinder; Low oil pressure or cylinder pressure, resulting in insufficient power. 4, oil oxidation or low grade, mainly due to poor low-temperature fluidity, engine cold start protection is not in place.