What is the reason for the MG's throttle being fully pressed but the RPM not increasing?

[VonConnor]

It could be caused by excessive carbon deposits. Due to carbon buildup, localized high temperatures may cause the combustible mixture to ignite prematurely from the carbon deposits, disrupting the engine's normal operation. Check the fuel tank pump: See if it is functioning properly. The fuel pump motor will make noise when working. If the fuel pump cannot supply fuel normally, it will result in insufficient vehicle power. Check the intake pipe: Inspect the intake pipe for any dirt blockages. Remove the air filter to check for water ingress. Replace the air filter if necessary. Check if the valve timing is correct and whether the intake and exhaust pipes are tightly sealed. You can clean the throttle body or add a cleaning-type fuel additive (fuel system cleaner) to the fuel, which can achieve a certain carbon removal effect.