Does Revving the Engine in Neutral Harm the Car?

[DianaFitz]

Revving the engine in neutral can harm the car, primarily causing damage to the engine and accelerating its wear, especially when the car is not started. It is considered a destructive behavior to the vehicle. Repeatedly revving the engine in neutral can lead to carbon buildup, and prolonged idling can damage the engine. The throttle, also known as the air valve or accelerator, refers to the control device that regulates the engine's power (thrust). In piston aircraft engines, the throttle controls the carburetor's throttle opening to regulate the cylinder's filling volume, thereby determining the engine's output power. In gas turbine engines, the throttle controls the metered fuel flow of the fuel regulator, thus determining the thrust generated by the engine.