What is the reason why the car doesn't respond when stepping on the gas pedal?

First of all, we need to know one component, that is, the throttle.

Function of throttle: Throttle is a controllable valve to control 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 successfully formed after combustion. It connects the air filter and the engine block, and is called the throat of the automobile engine.

Therefore, stepping on the accelerator is not to control the fuel injection quantity, but to control the air intake quantity through the opening of the accelerator, and the on-board computer adjusts the fuel injection quantity through the air intake quantity.

Therefore, when the accelerator pedal is depressed, the vehicle does not respond or vibrate. It is very likely that there is something wrong with the accelerator of the vehicle, such as the valve stuck. At first, there is something wrong with the accelerator position sensor.

It is recommended to check the throttle valve.