What is the cause of engine jitter in Southeast v3 Yue Ling?

Causes and solutions of vibration of Yue Ling engine in Southeast v3: 1, serious carbon deposition on the engine. The common cause of automobile vibration is that the throttle valve is too dirty and there is too much carbon deposited at the fuel injection port. If the engine has too much carbon, the gasoline sprayed by the cold start injection head will absorb a lot of carbon; The accumulated carbon needs to be removed immediately; 2, engine cylinder, engine cylinder mainly refers to the engine more than one cylinder is not working properly. The phenomenon is that the automobile exhaust flow is obviously intermittent, while the exhaust pipe vibrates violently, and the engine vibrates obviously, sometimes accompanied by sudden noise. This is related to the problem of ignition coil failure; The related parts of the ignition system need to be replaced. 3. The engine combustible mixture becomes lighter or thicker, resulting in idling vibration after cold start. The lower the temperature, the more oil is needed for cold start, and carbon deposition will affect the success of cold start. The front oxygen sensor needs to be replaced. If the engine vibrates, the vehicle should be inspected and maintained immediately, and the ignition system, air intake system and fuel system should be checked for faults. If there is any fault, it should be eliminated immediately.