What is the reason for high engine RPM but no increase in speed when the accelerator is fully pressed?
2 Answers
The reasons for high engine RPM but no increase in speed when the accelerator is fully pressed are: 1. The throttle position sensor is dirty or has voltage imbalance; 2. The engine's intake, fuel system, or ignition has a malfunction or abnormality; 3. The intake system has leaks or blockages; 4. The engine's fuel system has a malfunction. Solutions: 1. Use a fuel filter, where fuel passes through layers of filter paper from the outer wall to the center, allowing clean fuel to flow out; 2. Replace the clutch pedal; 3. Replace the release bearing return spring; 4. If there is noise when the clutch just engages or disengages, it indicates that the driven plate rivets are loose or exposed, and the driven plate should be replaced.
I've also experienced the awkward situation where the throttle is floored, the RPM is high, but the car speed doesn't increase. This is usually because the clutch in a manual transmission car is slipping, and the worn clutch disc can't effectively transfer power to the wheels, causing the engine to run in vain. Or, in an automatic transmission car, there might be an issue with the transmission, like insufficient oil pressure in the torque converter, making the car feel like it's idling. It could also be due to the engine itself lacking power, such as a clogged air filter restricting air intake or insufficient fuel pump pressure causing poor acceleration. I remember once driving on a mountain road with this issue, which almost affected the safety of overtaking. Later, it was found that the drive shaft was loose. It's advisable to find a safe place to stop and check, focusing on the clutch and transmission. If DIY troubleshooting doesn't resolve the problem, quickly find a professional shop for repairs. Don't delay with such symptoms, especially on highways where it's more dangerous. Regular maintenance checks can prevent this.
