What are the reasons for the car's throttle being fully pressed but the RPM not increasing?

[LaAlaina]

The reasons for the car's throttle being fully pressed but the RPM not increasing are: 1. Damaged spark plugs: The spark plugs are damaged, and the wear of the spark plug electrode gap leads to insufficient spark plug ignition, resulting in incomplete combustion of the air-fuel mixture; 2. Poor fuel quality: The poor quality of gasoline causes poor atomization of the fuel injector, leading to incomplete combustion of the air-fuel mixture in the cylinder. It is recommended to use higher-grade gasoline and perform a fuel system cleaning; 3. Unstable fuel pressure: If the engine carbon deposits have been cleaned, the engine oil has been changed, and the spark plugs have been replaced, but the problem persists, it is necessary to go to a repair shop to check whether the fuel supply pressure and the intake pressure sensor are normal. If the fuel pump supply pressure is abnormal or the intake pressure sensor value is incorrect and not working properly, the fuel pressure should be checked, and parts should be replaced if necessary.