Will the blockage of throttle exhaust pipe lead to unstable idle speed?

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, which will be burned to do work. It connects the air filter and the engine block, and is called the throat of the automobile engine.

In addition, the throttle valve and the exhaust pipe are the same path,

So if your throttle or exhaust pipe is blocked, it will reduce the combustion efficiency, so the idle speed will be lower. At the same time, the cold car needs to step on the accelerator when starting, otherwise it will not start. Replace it as soon as possible.