What's wrong with Suibao d50 idling jitter?

Cause of vibration of Sic Bo d50 engine: 1. The most common cause of automobile vibration is that the throttle is too dirty or the nozzle has too much carbon. 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. The mixture causing cold start is too thin, making it difficult to start. In this case, it is easy to run into the car only when the gasoline absorbed by carbon deposits is saturated. After running into the car, the gasoline adsorbed on the carbon deposit will be sucked into the cylinder for combustion by the vacuum suction of the engine, which will make the mixture rich, and the combustible mixture of the engine will be diluted and concentrated, resulting in idling jitter after cold start; 3. The lower the temperature, the more oil is needed for cold start, and the existence of carbon deposit will affect the smooth start.