What Causes Abnormal Noise and Inability to Increase Speed When Accelerating?

[StJayla]

Abnormal noise and inability to increase speed when accelerating may be due to low engine torque or transmission slippage and wear. Below is relevant information about the accelerator: 1. Brief Introduction: The accelerator pedal, also known as the throttle pedal, is part of the vehicle's fuel supply system. By controlling the pedal's depression, it regulates the engine throttle opening, air intake, and computer-controlled fuel injection, thereby managing the engine's speed. 2. Handling Procedure: If encountering accelerator pedal issues during the break-in period of a new vehicle, remain calm. Follow professional advice (indeed, this is the only reasonable approach)—fully depress the brake pedal to bring the vehicle to a complete stop, turn off the engine, and then contact for assistance.

[Camilla]

When I press the accelerator and hear abnormal noises while the speed fails to increase, it may indicate issues with the engine fuel system or transmission. For example, aged spark plugs causing insufficient ignition can lead to abnormal cylinder operation and produce a buzzing sound; a clogged fuel filter resulting in inadequate fuel supply makes the car feel sluggish; or a slipping clutch causing power loss during gear shifts, with noticeable idling noises. This can also increase fuel consumption and compromise driving safety. Last time I ignored it, I ended up spending much more on major repairs. In summary, inspection points include checking for carbon buildup in the ignition system and identifying the source of the noise to determine the location, then promptly visiting a repair shop to avoid breakdowns. For daily driving, it's important to warm up the engine and perform regular maintenance, such as cleaning carbon deposits annually, to extend component lifespan.

[LaCayden]

This issue is quite common, and the source of abnormal noises can vary, such as insufficient engine air intake or transmission failure. When you press the accelerator and hear noise without an increase in speed, it might be due to a dirty air filter struggling to draw in fresh air, causing the car to make a rattling sound as if it can't breathe. Alternatively, a stuck turbocharger impeller could affect boost efficiency. For a quick self-check, pop the hood to locate the noise and inspect belt tension. Don't push the car too hard, as it may damage more components. Try replacing the air filter first; if that doesn't help, consult a professional to read the fault codes. Avoid sudden acceleration and start gently to protect the engine during regular driving.

[StKendra]

Every time I press the accelerator deeply, the engine noise is loud but the car doesn't move, which is frustrating. It's often due to insufficient fuel supply from a weakening fuel pump or delayed ignition caused by carbon buildup on spark plugs, resulting in a clicking sound and stalled speed. A blocked exhaust system can also produce a gurgling noise. This affects daily commutes, such as when the car lacks power when in a hurry. Listen to whether the abnormal sound comes from the front or bottom; check if an old battery is causing unstable power supply. Timely cleaning of spark plugs or using higher-quality fuel can help. Try to avoid driving at high speeds to prevent accidents.