What Causes the Abnormal Noise When Accelerating by Pressing the Throttle?

[JohnnyMarie]

The causes and solutions for abnormal noise when accelerating by pressing the throttle are as follows: Fuel pump motor noise: When the fuel pump motor is internally worn or contains impurities, it will produce abnormal noise as the throttle is pressed. Solution: This issue requires replacing the fuel pump. Throttle noise: Electronic throttles use motors to control the opening and closing of the throttle valve. When the motor gears are worn, insufficient engagement causes abnormal noise. Excessive carbon deposits and sludge in the throttle can also lead to noise. Solution: The throttle can be cleaned, and if the motor is damaged, the throttle needs to be removed and replaced.

[AllisonMarie]

My car also made a strange thumping noise when I stepped on the accelerator on the highway last year, especially noticeable during acceleration, feeling like a tense metal collision. I asked a few experienced mechanics, and they said there could be various reasons: the most common is engine knocking, caused by aging spark plugs or carbon buildup in the combustion chamber leading to uneven pressure, producing a knocking sound; second is an issue with the belt system, where a loose or severely worn drive belt can produce a squealing noise when the RPM increases; third is a leak in the exhaust system, where increased airflow during acceleration can cause a roaring sound; fourth is wear in the transmission components like bearings or gears, creating a creaking noise from friction. If ignored, small issues can develop into engine damage or safety hazards, so they advised not to delay and to go directly to a professional repair shop for a comprehensive check. Maintaining daily components well can save a lot of trouble.

[MackenzieLynn]

Dealing with similar issues daily at the repair shop, abnormal noises during car acceleration are all too common. Typically, it's caused by aging belts slipping and squealing, or spark plug carbon buildup leading to knocking; exhaust pipe leaks roaring during acceleration; more severe cases like a failing driveshaft bearing producing grinding sounds. We recommend owners first self-check belt condition: look for cracks or looseness; if that doesn't help, test voltage to inspect the combustion system; don't ignore sound characteristics: metallic noises may indicate knocking, while high-pitched sounds usually point to belt issues. Timely repairs can prevent major overhaul costs. Driving safety comes first.

[LeLogan]

Annoying noises when accelerating are really frustrating. Last time I accelerated, there was a loud crack. It could be engine carbon deposits causing knocking, or a loose belt squealing; exhaust cracks can also be loud. No matter the cause, it can easily escalate into a bigger issue. Get it checked at a repair shop ASAP. Stay safe and pay attention while driving.