What are the symptoms of dirty throttle?

When a car refuels, it will feel that the throttle is stuck, heavy and slow. When you step on the accelerator at idle speed, the speed rises slowly and the response is slow. When driving, release the throttle and the speed will drop immediately. Unclean throttle will affect the accuracy and smoothness of engine intake. One of the most obvious problems is that the idle speed may shake or even turn off, and the fuel valve acceleration is not smooth. A dirty car accelerator will have the following symptoms: 1. When the throttle is dirty, the most obvious phenomenon is that the throttle is stuck and heavy, the speed increases slowly, and the idle speed reacts slowly to the throttle. Once the throttle is released, the speed will decrease immediately; 2. At the same time, it will affect the accuracy and smoothness of engine air intake. One of the most obvious problems is that it may lead to idling jitter or even flameout, and the growth rate of the fuel filler door is not smooth; When the throttle is dirty to a certain extent, it has already acted on the engine and needs to be cleaned. At this time, the self-regulating air intake of the driving computer will be inaccurate, and the work of the engine may be affected.