What is the problem of unstable idle speed, high and low, good and bad?

The stolen goods produced in the air and the sludge produced by gasoline are easy to cause the vehicle throttle to be too dirty, resulting in poor operation of the idle motor. Idle mechanism is: the change of air force in the cylinder (the change of air force in one cylinder or several cylinders) leads to the imbalance of power in each cylinder, which affects the inconsistency of horizontal force components of each piston when working, and makes the engine roll and dump. It can also be said that the change of air force in the engine cylinder is ineffective, which may basically affect the idle vibration of the engine. Reasons for getting better and worse when idle speed is unstable. 1, the idle speed is unstable, and it is possible to clean the throttle; Even if the idle speed control valve fails, the idle speed is unstable and must be repaired at the auto repair shop immediately; 2. The idle speed control valve is installed in the bypass vent hole of the throttle valve. According to the ignition signal, when the engine speed is lower than 750 rpm, the idle speed controller immediately starts the idle speed control valve to increase the engine speed. In vehicles equipped with refrigeration system, the engine speed is also called the idle speed increasing valve. After the refrigeration compressor works, the engine load is generated, which makes the engine idle down, and the idle speed control valve works to maintain the stability of idle speed. 3. Throttle is one of the most important components in computer engine system. Its upper part is the air grid of the air filter, and the lower part is the engine body, which is the throat of the automobile engine. Whether the acceleration of a car is flexible or not has a great relationship with the pollution of the throttle. Cleaning the throttle can reduce fuel consumption and make the engine flexible and full of vitality.