What Causes Abnormal Noise When Accelerating a Car?

[HectorMarie]

Reasons for abnormal noise when accelerating a car: 1. Fuel pump motor noise: When internal wear or impurities exist in the fuel pump motor, abnormal noise occurs upon acceleration. This issue requires fuel pump replacement. 2. Throttle body noise: Modern throttle bodies use electronic control, with motors naturally controlling valve opening/closing. Gear wear in the motor causes insufficient engagement and noise. Excessive carbon deposits or sludge in the throttle body can also cause noise. Cleaning the throttle body may help, but motor damage requires throttle body disassembly and servo motor replacement. 3. Poor lubrication in accelerator pedal bearings: Apply grease to the bearings for lubrication. 4. Clutch release bearing damage causing incomplete clutch disc separation: Remove the clutch and replace the release bearing.