What Causes the Zizzing Sound When Accelerating the Car?

1 Answers
Emman
07/29/25 5:13pm
Vehicle acceleration noise is caused by excessive clearance in the drive shaft or insufficient lubrication. Below are the specific reasons: 1. Fuel pump motor noise. When the fuel pump motor is internally worn or contains impurities, it will produce noise upon acceleration, requiring fuel pump replacement. 2. Poor lubrication of the throttle pedal bearing causing noise. You can apply grease to the bearing for lubrication. 3. Damaged clutch release bearing, leading to incomplete clutch disc separation and noise. Remove the clutch and replace the release bearing. 4. If abnormal throttle occurs while driving, stay calm. Fully depress the brake pedal, stop the vehicle safely, turn off the engine, and then call for assistance. When starting the engine, do not press the throttle pedal all the way down; keep it slightly above idle throttle.
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