What are the causes of high engine speed?

[DeRobert]

The causes of high engine speed include sudden increase in throttle opening, fuel injector dripping or clogging, air conditioning clutch slipping or damage, air intake system leakage, and insufficient engine power output. Solutions for high engine speed: Adjust throttle opening; replace fuel injector, air conditioning clutch, air intake system, or engine. Classification: An engine is a machine that converts other forms of energy into mechanical energy. It can be divided into: External combustion engine: fuel burns outside the engine; Internal combustion engine: fuel burns inside the engine; Gas turbine: combustion produces high-pressure gas, which drives the turbine blades to rotate; Jet engine: an engine that directly generates thrust by the high-speed jet of gas from the nozzle.