What causes abnormal noise when stepping on the accelerator?
2 Answers
When abnormal noise occurs while stepping on the accelerator, it may be due to excessive clearance in components such as the drive shaft, poor lubrication, or improper assembly during maintenance, which causes friction and noise when high torque is output. On the right side of the engine, it is usually the belt of the generator; on the left side, it could be an issue with the throttle. Below are some explanations for abnormal noises: 1. Abnormal noises can be categorized into minor noises, moderate noises, and severe noises based on their impact on vehicle performance. 2. Minor noises, such as the sparking sound from high-voltage electricity leakage or slight looseness in rolling bearings, are generally low in volume and do not indicate significant wear. These issues can persist for a long time without noticeable changes, and the vehicle can still operate normally without immediate repair. 3. Moderate noises, such as those from the flywheel bearing or clutch release bearing, have a noticeable impact on vehicle performance but can still maintain the main technical performance in the short term. These noises are usually louder and indicate greater wear on the components, so timely repair is recommended.
Experiencing strange noises when stepping on the gas pedal is something I've encountered multiple times, usually serving as a signal that it's time to check the car. The noises could come from several sources, such as a loose or aged drive belt causing friction sounds, especially noticeable when accelerating as the engine load increases. It might also be a bearing issue, with the wheels producing a squeaky sound, sometimes accompanied by steering wheel vibrations. I recommend first asking a friend to help identify the noise's location. If it's from the front, it might be components near the engine needing tightening; if it's from the back, an exhaust pipe leak is likely, producing a whooshing sound. Don’t delay—visit a professional repair shop promptly to prevent minor issues from escalating into costly repairs. Checking the belt tension and oil condition can prevent half the problems with simple maintenance.
