Is it okay to rev the engine in neutral?

[SanKai]

It is not advisable to rev the engine in neutral, as doing so subjects the engine's moving parts to significant inertial forces, which can compromise the engine's reliability and lifespan. The consequences of revving the engine in neutral include: 1. Incomplete combustion; 2. Carbon buildup; 3. Clogging of the catalytic converter. The functions of the throttle are: 1. Controlling the engine's speed by adjusting the pedal's travel; 2. Regulating the carburetor to determine the engine's output power. The working principle of the throttle is: When the accelerator pedal is pressed, it directly controls the throttle valve. The throttle valve opens wider, allowing more air to enter the engine. At this point, the ECU commands the fuel injection system to inject more fuel, increasing the engine's RPM and thus accelerating the vehicle.