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Why does the engine speed not increase when the accelerator is fully pressed?

2 Answers

OLayla

07/29/25 5:16am

The reasons why the engine speed does not increase when the accelerator is fully pressed include the accelerator pedal being blocked by the floor mat, accelerator pedal malfunction, clogged fuel system in the car, ignition system failure, etc. If the accelerator pedal cable fails or the throttle position sensor malfunctions, the accelerator will not function properly. In such cases, it is necessary to visit a repair shop or a 4S store for a detailed inspection by professionals. Clogged fuel system in the car: If the fuel system is clogged, fuel cannot be transported normally, and the engine's efficiency will not increase. As a result, pressing the accelerator will not make the car move. In this situation, the car's fuel system needs to be inspected and cleaned.

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Marques

08/12/25 8:52am

I've encountered this issue with my old car before—stepping on the gas pedal all the way but the RPM just wouldn't budge, which was really frustrating. The engine might be protesting—either the fuel pump is broken and can't supply fuel, or the injectors are clogged and can't spray fuel. If the air filter hasn't been replaced for too long, the engine can't suck in air and will struggle to breathe. Sensor failures are also common; for example, if the crankshaft position sensor fails, the ECU won't receive RPM signals and will limit power. I delayed fixing it for a few days back then, and ended up stranded on the road, almost causing a major problem. Check the fuel system and electrical connections right away—if a small part is broken, replacing it might solve the issue. If it's too serious, take it to a professional shop for a thorough inspection. Safety comes first when driving—don't wait until the problem escalates. Addressing it early saves time and effort.

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