Is the idle speed of the car unstable after cleaning the throttle?

Cause of unstable idle speed of the car after cleaning the throttle: 1, too much carbon deposit. If the carbon deposition in the engine cylinder is serious, it will cause spark plug blockage and valve blockage, which will directly lead to the idling jitter of the car. If the acceleration ability of the car is not as good as before and the jitter is very lasting, then you can consider cleaning the engine cylinder; 2. Failure of the oil supply system and unstable oil pressure will easily lead to unstable mixture concentration, which will not only cause jitter but also cause unstable idle speed; 3. You can consider replacing the gasoline filter first. After all, the filter element may be blocked after being used for a long time, so don't use the gasoline filter to check the oil pressure. If it is not normal, there may be something wrong with the oil pump.