What are the symptoms of throttle leakage?

Symptoms of air leakage from the throttle: engine idling is unstable, there is a sense of rush when driving, and power is insufficient. After parking, the engine will turn off occasionally, and the leaking part will blacken the hood. Throttle air leakage is generally caused by air leakage between throttle seat and intake pipe interface seat. This interface is usually fixed with screws and clips, which can easily lead to air leakage if improperly installed. The solution to the air leakage of the throttle valve is to directly replace the plastic hose between the throttle valve and the intake manifold. Function of throttle valve: 1. Throttle is a controllable valve that controls air to enter the engine. After air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned; 2. The throttle valve is connected with the air filter and the engine block, which is called the throat of the automobile engine.