Is Revving the Engine in Neutral Harmful?

[BentleyAnn]

Revving the engine in neutral is harmful, as it subjects the engine's moving parts to significant inertial forces, affecting the engine's reliability and lifespan. The throttle works as follows: pressing the accelerator pedal directly controls the throttle valve, increasing its opening and allowing more air into the engine. The ECU then commands the fuel injection system to inject more fuel, raising the engine's RPM and accelerating the vehicle. Precautions for using the accelerator include: 1. Press and release the accelerator pedal gently and smoothly; 2. Coordinate the clutch release with the accelerator pedal for agile operation; 3. Select appropriate gears to keep the engine running mostly at medium RPM and larger throttle openings for fuel efficiency; 4. Before stopping or turning off the engine, release the accelerator pedal first and avoid sudden revving in neutral.