What Causes No Response When Pressing the Accelerator While Driving?
2 Answers
When pressing the accelerator while driving, the lack of response may be caused by a transmission malfunction. The specific reasons and the working principle of the accelerator are as follows: Reasons: 1. Issues with the ignition system: The car's ignition system includes spark plugs and ignition coils. If there is a problem with the ignition system, the car may exhibit a slow increase in RPM when the accelerator is pressed. 2. Problems with the intake system: If the throttle fails or there is a leak in the intake manifold, the car's RPM will not increase after pressing the accelerator. 3. Issues with the fuel supply system: For the engine to function normally, the fuel pump needs to maintain pressure. Working Principle: When the accelerator is pressed, the ECU (central control unit) receives the signal to increase fuel, causing the fuel injectors to increase the fuel supply, thereby increasing the combustible mixture in the cylinders.
After driving for so many years, I've encountered situations where the throttle suddenly becomes unresponsive, which is no small matter. The most common reason, I think, is something getting stuck around the throttle pedal, like loose change or the floor mat blocking it, or the pedal spring loosening and failing to return. It could also be severe carbon buildup in the throttle body, with dirt clogging the intake, causing the engine to not get enough air. If it's a mechanical issue, like a rusty or broken throttle cable, that's also troublesome. Additionally, a malfunction in the fuel system is possible, such as a failed fuel pump or a clogged fuel line, where poor fuel flow naturally leads to no response. It's also common for the electronic throttle's sensor to fail, preventing signals from reaching the computer to control fuel injection. In such cases, it's best to pull over, turn off the engine, and try restarting. If it still doesn't work after restarting, don't force it—head to a professional repair shop immediately for inspection. For prevention, regularly cleaning the throttle components and replacing the air filter is crucial.
