Jetta, throttle and speed limit line, what's the reaction when they break down?

The throttle valve is broken. The faults are as follows:

The engine idle speed is unstable, the high speed drops discontinuously, and it is difficult to start the engine, especially the cold start.

The engine reading speed is unstable or there is no idle speed.

It is difficult to start the engine.

The engine has insufficient power, poor acceleration performance and unstable operation.

Throttle is a controllable valve that controls air to enter the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, and the combustion is successful. It connects the air filter and the engine block, and is called the throat of the automobile engine.

Throttle four-stroke gasoline engines are generally like this. Throttle is one of the most important components in EFI automobile engine system. Its upper part is the air cleaner grille, and the lower part is the engine body, which is the throat of the automobile engine.