Throttle becomes idle or unstable.

Is related. Engine idling instability usually means that the throttle is dirty and needs cleaning: 1. Engine idling performance has a great influence on emissions, fuel consumption and comfort. Therefore, engine idling performance is an important index to evaluate engine performance; 2. When idling, the engine is separated from the transmission system, the accelerator pedal is completely loosened, and the engine only overcomes its own resistance and does not output work; 3. The engine idle speed is called idle speed, which cannot be too high or too low. Too high will increase fuel consumption, too low will make the engine idling unstable. 4. The lowest idle speed to ensure the stable operation of the engine is the best idle speed. Generally speaking, the idle speed of automotive diesel engines is 500,800 rpm, and that of gasoline engines is 700 1000 rpm.