How to adjust the idle speed of the car

If the idle speed is to be adjusted, the throttle idle speed control valve needs to be adjusted. When idling, it is the throttle idle control valve that controls the intake of the engine. You only need to adjust the opening of the throttle idle control valve to adjust the idle speed. However, it is recommended not to adjust the idle speed of the engine at will.

All car engines have throttles. The throttle is like a throat. The throttle controls the intake of the engine.

After stepping on the accelerator pedal, the fuel injection quantity is not directly controlled, but the throttle opening is controlled.

The larger the throttle opening, the higher the engine intake. After ecu detects the increase of intake air, it will control the fuel injection system to inject more fuel, thus increasing the engine speed.

Most new cars will use electronic accelerator, and there is no physical connection between accelerator and accelerator pedal.

When the driver presses the accelerator pedal, the signal will be transmitted to the electronic control unit. After processing, the ECU sends a signal to the throttle motor so that the motor can control the throttle.

The classic car will use the cable accelerator and connect with the accelerator pedal through the cable.

Pulling the throttle does not enable ecu to control the engine more accurately, but it has the advantage of quick response. Many racing cars still use the throttle because there is no need to consider fuel economy.

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