Why is there a metallic friction sound when pressing the accelerator?

1 Answers
AaronFitz
07/30/25 8:57am
Pressing the accelerator and hearing a metallic friction sound is usually caused by carbon buildup in the intake system. It is recommended to visit a repair shop for cleaning. Below are some related introductions about car abnormal noises: 1. Car half-shaft issue: The car's half-shaft, under long-term torsional fatigue and impact forces, is prone to bending, twisting, breaking, or wear and skewing of spline teeth. These faults can cause the car to shake rhythmically and produce noise when accelerating within a certain speed range, with the shaking disappearing or reducing after releasing the accelerator. 2. Engine belt looseness: A slipping belt will produce abnormal noises. Once the belt slips, it leads to friction and high temperatures, causing the belt to stretch further and worsen the slipping, creating a vicious cycle. In such cases, it is necessary to visit a repair shop to adjust the belt.
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