What are the reasons for abnormal noise when pressing the car accelerator?
4 Answers
The reasons for abnormal noise when pressing the car accelerator are: 1. Excessive clearance or poor lubrication of the drive shaft; 2. Improper assembly, causing high torque output and friction; 3. Engine knocking; 4. Lack of engine oil or low oil pressure; 5. Damage to the clutch release bearing; 6. Air leakage in the engine intake pipe. Solutions for abnormal noise when pressing the car accelerator: 1. Check for air leakage in the engine intake pipe; 2. Check if there are any issues with the air filter installation; 3. Check for aging, looseness, or slipping of the engine belt; 4. Check the wear condition of the clutch.
I've been driving for over 30 years and encountered many abnormal noise issues when pressing the accelerator, which often stem from problems in the throttle system itself. The most common causes are worn or rusted throttle cables, resulting in friction sounds; lack of lubrication in the pedal pivot can also cause squeaking, especially in older models or after rainy days. Secondly, sensor failures in electronic throttle vehicles can trigger beeping sounds or false alarm noises. Additionally, clogged air intake filters or air duct leaks in the engine compartment can produce abnormal whistling sounds when accelerating. Loose chassis components like suspension bushings may also resonate and create noise. I recommend first identifying the source by listening to the sound location and gently pressing the accelerator—if it's metal friction, try spraying some lubricant; if that doesn't work, check the wiring harness and chassis bolts. Don't delay too long, as it may lead to acceleration lag or loss of control risks. A thorough inspection at a professional shop is the safest option, and regular cleaning and lubrication of throttle components can effectively prevent such issues.
I usually commute by car, and last week my car made a squeaking noise whenever I stepped on the gas pedal, which really worried me. After checking, I found that the pedal bracket screws were loose, and the noise stopped after tightening them. It could also be caused by dust accumulation in the electronic throttle, leading to incorrect responses and resulting in strange noises accompanied by jerking. Aging steering linkage in the chassis can also cause resonance noises when the throttle is applied. I’ve learned to step on the pedal a couple of times before driving to test the sound source and manually check for loose parts. Another example is a dirty air filter, which can cause a whistling noise when the intake airflow is strong. Small issues can turn into expensive problems if ignored, so it’s best to address them early. Recording the noise with your phone for the mechanic to reference the location is helpful—most cases can be resolved with simple repairs.
As a long-distance driver, I understand that abnormal throttle noises should never be ignored, as they are warning signs of safety hazards. Possible causes include a throttle cable nearing breakage causing sticking, which affects acceleration control; false signals from electronic sensors triggering incorrect engine responses; or loose chassis components like failed springs that increase wobbling and accident risks at high speeds. While pinpointing the exact source of the noise can be challenging, immediate actions like pulling over to inspect and lubricating the throttle should be taken. If ineffective, promptly visit a professional repair shop. Delaying repairs may worsen the issue to the point of warning lights activating or sudden power loss, endangering driving safety—especially requiring extra caution during rain or snow conditions for preventive measures.
