What are the manifestations of dirty throttle?

Dirty throttle has the following performance: 1. When the throttle is dirty, you will feel that the throttle is stuck heavily, and the speed is slow, and the speed of stepping on the throttle at idle speed is slow and the response is slow. Release the throttle and the speed will drop immediately; 2. It will directly affect the accuracy and smoothness of engine air intake. One of the most obvious problems is that idling may cause jitter or even flameout, and the throttle speed is not smooth; 3. The throttle valve is dirty to a certain extent, which affects the work of the engine and needs to be cleaned. At this time, the automatic air intake control of the driving computer is inaccurate, which may affect the work of the engine.