What Causes a Car to Rev Without Pressing the Accelerator?

1 Answers
ChristopherLee
07/29/25 3:03pm
When a car revs without pressing the accelerator, it is mostly due to a faulty idle speed motor. Checking the idle speed motor and cleaning the throttle body should resolve the issue. Below is a detailed introduction to the car accelerator: 1. The car accelerator is a device on an internal combustion engine that controls the fuel supply. 2. While driving, the driver controls the amount of air intake by adjusting the pedal pressure, thereby regulating the engine speed. Here are the correct steps to press the accelerator: 1. Place your right foot on the center of the accelerator pedal, pressing with the ball of your foot near the toe. 2. Press the pedal gently and release it slowly; avoid sudden or excessive force, and maintain a smooth motion. 3. When not accelerating, do not keep your foot on the accelerator pedal; it is best to place it on the brake pedal to ensure timely braking in case of emergencies. 4. Occasionally revving the engine can help remove minor carbon deposits. You can rev the engine before shutting it off to expel carbon deposits, though this method is ineffective for old or heavy carbon buildup.
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