What are the reasons for no response when stepping on the accelerator?
2 Answers
Reasons for no response when stepping on the accelerator: 1. Transmission failure: If there is a problem with the transmission mechanism, the accelerator cannot be pressed down, and the engine speed will suddenly increase from 2000 rpm to 4000 rpm. The power is cut off, and the engine suddenly has zero load, causing fluctuations in the speed. 2. Throttle. 3. Accelerator pedal. 4. Brake override system: Modern cars are equipped with a brake override system. When the brake pedal and accelerator pedal are pressed simultaneously, the brake pedal takes priority, and the accelerator does not respond. If the floor mat accidentally touches the brake pedal, a brake signal is generated, and the brake override system will activate.
When the accelerator pedal doesn't respond, my first thought is whether there's an issue with the pedal itself. Sometimes the pedal gets stuck or the sensor fails, preventing the signal from reaching the engine control unit. Additionally, fuel system problems are quite common, such as a weak fuel pump or clogged fuel lines, which means fuel can't reach the engine. If the throttle body is dirty, it's like having a blocked throat—even if the throttle signal gets through, it can't open properly. I've seen many people encounter this, especially as the car ages, since electronic components tend to degrade over time. To prevent small issues from becoming big ones, it's advisable to regularly clean the throttle body and replace the fuel filter. If this happens suddenly, try gently pressing the accelerator pedal a few times to see if there's any response, or check if the brake light switch is affecting the system. For safety, don't force the car to drive; instead, take it to a repair shop to thoroughly inspect the wiring harness and sensors.