What Causes Abnormal Noise When Accelerating?

[GemmaMarie]

Abnormal noise when accelerating can be caused by the following reasons: Fuel Pump Issues: Problems with the car's fuel pump can produce abnormal noises. Additionally, throttle valve issues may also cause noise when pressing the accelerator. Furthermore, insufficient lubrication of the accelerator pedal bearings can result in noise when the driver presses the pedal. However, if the noise is due to poor lubrication, simply applying grease to the bearings can resolve the issue. Driveshaft Problems: Excessive clearance in components like the driveshaft, poor lubrication, or improper assembly during repairs can cause friction noises when high torque is output. On the right side of the engine, the noise is usually from the generator belt. On the left side, it's typically a throttle valve issue. Abnormal noises can be categorized based on their impact on vehicle performance into minor, moderate, and severe noises.