What are the manifestations of dirty throttle?

When starting, the idle speed is unstable, or when the engine speed drops to 500 rpm when the red light hits the brake, the throttle dirt will occasionally turn off. In severe cases, if you can't get off the bus, the engine fault indicator will light up. Cleaning the throttle valve is relatively simple. Remove the air intake pipe, four throttle fixing bolts, 2 and the cooling water pipe, unplug the throttle position sensor, and remove the throttle body for cleaning. Throttle pollution is naturally the power of the engine. If the idle speed of the vehicle is unstable, it is difficult to start and the power drops, indicating that the automobile throttle may need to be cleaned. The following is the knowledge about throttle. 1. The throttle valve is a control valve that controls air to enter the engine. After the air enters the intake pipe, it is mixed with gasoline to form a combustible mixture, which is burned to do work. The throttle can be represented by the "throat" of the engine. The depth of stepping on the accelerator determines the power and adaptability of the engine according to the throttle opening. 2. Under normal circumstances, the 4s shop advises the owner to clean the throttle regularly, usually once every 20,000-40,000 kilometers. However, it should be noted that checking and cleaning the throttle does not make it better. Excessive cleaning will abandon the throttle valve in advance, and a frequent cleaning will gradually clean the special coating in the inner cavity of the throttle valve, leading to the loss of the coating in the inner cavity, which is prone to greasy adhesion, forming a vicious circle and eventually scrapping. 3. Precautions for Throttle: After cleaning the throttle, reset the throttle opening. Otherwise, the on-board computer would have remembered the opening when carbon was deposited. If it is not reset, the idle speed of the engine is unstable and the speed is too high. The replacement method varies with different models, so it is recommended to go to a professional repair shop or 4s shop for maintenance.