What is the reason for the current-like sound when stepping on the accelerator?
2 Answers
The reasons for the current-like sound when stepping on the accelerator are: 1. Wear or impurities inside the fuel pump motor, which requires replacing the fuel pump; 2. Throttle body noise, which can be resolved by cleaning the throttle body, or replacing the servo motor if it is damaged; 3. Poor lubrication of the accelerator pedal bearing causing noise, which can be fixed by applying grease to the bearing; 4. Damaged clutch release bearing, leading to incomplete separation of the clutch plate and resulting in noise, requiring the replacement of the release bearing. The accelerator pedal, also known as the throttle pedal, is part of the car's fuel supply system. By controlling the amount of pedal depression, it regulates the throttle opening of the engine, controls the air intake, and the computer adjusts the fuel quantity, thereby controlling the engine speed.
I've been driving for over twenty years and have encountered the electric current-like noise when stepping on the accelerator. Most of the time, it's caused by a loose drive belt or a faulty alternator bearing. The sound is like a buzzing electric current, usually getting louder when accelerating and disappearing when releasing the throttle. There could be other reasons, such as a faulty throttle position sensor or loose battery terminals causing unstable current. A loose drive belt can cause friction noise, while a damaged alternator bearing can make the rotor spin unevenly, producing abnormal sounds. I suggest doing some initial checks yourself: start the car, step on the accelerator, and listen for the source of the noise. If it's near the front wheels, it might be a belt issue; if it's around the middle of the engine, it's likely the alternator. It's better to take it to a repair shop early to avoid the problem worsening and affecting driving safety. Once, I ignored it, and the belt snapped, leaving me stranded on the road—costing both time and money.
