What are the consequences of revving the engine in neutral gear?

[LaReese]

The consequences of revving the engine in neutral gear include: 1. Incomplete combustion; 2. Carbon buildup; 3. Clogging of the three-way catalytic converter. The working principle of the throttle is: Pressing the throttle pedal directly controls the throttle valve, increasing its opening. This allows more air to enter the engine, and the ECU commands the fuel injection system to inject more fuel, thereby increasing the engine speed and accelerating the vehicle. Precautions for using the throttle include: 1. Press and release the throttle pedal gently and smoothly; 2. Coordinate the clutch release with throttle application promptly and precisely; 3. Select appropriate gears to ensure the engine operates mostly at medium speed and larger throttle openings for fuel efficiency; 4. Before stopping or turning off the engine, release the throttle pedal first and avoid suddenly revving the engine in neutral.