What is the reason for the sudden increase in idle speed when releasing the accelerator and pressing the clutch?

[DiIker]

The reason for the sudden increase in idle speed when releasing the accelerator and pressing the clutch is: 1. The throttle valve's opening and closing position is inaccurate; 2. The throttle valve's opening and closing mechanism is damaged. The function of the car accelerator is: 1. By controlling the amount of pedal pressure, the engine speed can be controlled; 2. The accelerator controls the carburetor to determine the engine's output power. The working principle of the car accelerator is: When the accelerator pedal is pressed, it directly controls the throttle valve. The throttle valve opening will increase, allowing more air to enter the engine. At this time, the ECU will command the fuel injection system to inject more fuel, causing the engine speed to rise and the car to accelerate.