What Causes Abnormal Noise When Pressing the Accelerator?

[CoraLee]

Abnormal noise when pressing the accelerator may be caused by excessive clearance in components such as the drive shaft, poor lubrication, or improper assembly during maintenance, which leads to friction sounds under high torque output. The following is an introduction to related content: Abnormal noises can be categorized based on their impact on vehicle performance into minor noises, moderate noises, and severe noises. Minor noises, such as sparking from high-voltage electricity leakage or slight looseness in rolling bearings, generally have low volume and cause minimal wear on components, with no significant changes over a long period. These issues can often be tolerated without immediate repair while maintaining normal vehicle operation. Moderate noises, such as those from flywheel bearings or clutch release bearings, have a noticeable impact on vehicle performance but can still maintain key technical functions in the short term. These noises are usually louder and involve greater component wear, so they should be repaired promptly.