Why does the car make loud noise when stepping on the accelerator?

[MacTalia]

The reasons for loud noise when stepping on the accelerator are: 1. Engine overheating causing loss of power; 2. Blocked internal engine valves; 3. Exhaust pipe leakage; 4. Dirty or clogged throttle; 5. Engine misfire (cylinder failure); 6. Lack of power steering fluid; 7. Damaged generator bearing; 8. Problems with power steering pump or water pump. The accelerator, also known as the throttle or air valve, refers to the control device that regulates engine power. The driver operates the throttle lever in the cockpit, which transmits commands through the control system components to the carburetor or fuel regulator on the engine. The functions of the accelerator are: 1. Controlling engine speed by adjusting the pedal pressure; 2. Regulating the carburetor to determine the engine's output power.

[KayleeAnn]

I've been driving for many years and it's quite common to encounter situations where the throttle noise becomes louder. Generally speaking, it could be due to carbon buildup in the engine, where incomplete fuel combustion leads to increased noise. Alternatively, there might be an air leak in the intake system, or the air filter is clogged, causing the car to struggle and gasp for air. Another possibility is an issue with the exhaust system, such as a broken muffler or loose exhaust pipe connection, resulting in a whistling sound when exhaust gases escape. Sometimes, a slipping clutch can also produce strange noises, especially noticeable in manual transmission cars during acceleration. I recommend paying regular attention to your car's condition, servicing it every six months, and checking the engine oil, filters, and pipe sealing. If the noise suddenly becomes very loud, don't delay—take it to a repair shop immediately to check the ECU data with a diagnostic tool. Safety comes first; small issues can turn into big problems if ignored. Remember, pressing the throttle should feel smooth and quiet.

[DeAlexandra]

Last month, I noticed that the sound when stepping on the accelerator was as loud as thunder. At first, I thought it was due to uneven roads, but upon closer listening, it seemed like the wheel bearing was damaged, with an annoying buzzing noise. Alternatively, it could also be that the suspension system was loose, causing the car body to be unstable and generating resonant noise during acceleration. Some modern cars use turbochargers, and leaks in the turbocharger can make the airflow noise louder. I checked the manual, and it might be an issue with the drive shaft or insufficient transmission oil, as the sound coming up from the chassis was quite noticeable. It's recommended to check tire pressure and chassis screws before each refueling; small repairs can save money and hassle. That time, I spent 300 yuan to replace the bearing, and the noise was gone. Regular maintenance helps prolong the lifespan of parts. Excessive noise while driving can be distracting and lead to fatigue on high-speed drives, so it's important to address it promptly.

[LePaige]

I've been into cars for over a decade, and there are many reasons why the engine sound becomes louder. The most common is an improper air-fuel ratio, caused by dirty sensors or spark plug carbon buildup leading to abnormal combustion. Or the exhaust tailpipe might be cracked, with air leaking out causing a whooshing sound. Intake manifold leaks can also amplify noise. Simple checks I recommend: start the car and listen if the engine idles normally, then press the accelerator to see if there's weak acceleration. For hybrid or electric component failures, the sound may be more high-pitched. Don't ignore it - regular throttle body cleaning and air filter replacement can prevent this. Louder engine noise often means higher fuel consumption, potentially losing dozens of kilometers per tank, which wastes money and pollutes the environment.