Why Is There Abnormal Noise When Stepping on the Accelerator in a Car?
1 Answers
Abnormal noise when stepping on the accelerator in a car is usually caused by excessive gaps in components such as the drive shaft, poor lubrication, or improper assembly during repairs, resulting in friction-generated sounds when high torque is output. Abnormal noises can be divided into three categories: Abnormal noises (unusual sounds) can be classified based on their impact on vehicle performance as minor noises, moderate noises, and severe noises. Minor noises, such as sparking from high-voltage leakage or slight looseness in rolling bearings, are generally low in volume and do not significantly affect component wear over time. These issues can often be ignored 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 sustain key technical functions in the short term. These noises are usually louder and indicate greater component wear, requiring timely repairs. Accelerator Pedal Issues: When starting the engine, the engine oil temperature may not have reached its normal operating value, leading to viscosity unsuitable for the hydraulic lifter's optimal performance. Reduced sealing in the hydraulic lifter can produce noise. If accelerator pedal issues occur while driving a new car, remain calm. The only reasonable solution, as recommended by professionals, is to firmly press the brake pedal, bring the vehicle to a complete stop, turn off the engine, and then contact for assistance. When starting the engine, avoid fully depressing the accelerator pedal; slightly higher than idle throttle is preferable.
