What Causes Sudden Automatic Throttle Increase in Neutral Gear?

[Yolanda]

Sudden throttle increase may be related to the engine speed. The engine speed affects the number of work cycles per unit time or the effective power output of the engine, meaning the engine's effective power varies with different speeds. Engine speed: For a given effective power output, there is a corresponding optimal speed ratio. Speed and power: When a sudden increase in speed occurs, it indicates a mismatch with the actual power output, leading to increased fuel injection. Under certain speed conditions, the ECU adjusts the fuel injection quantity based on collected data. This data is typically derived from a comprehensive analysis of factors such as throttle opening, coolant temperature, and intake conditions to determine the correct fuel injection timing and quantity. Solution: It is recommended to inspect the intake system and related piping; check the throttle body (including sensors); examine the coolant temperature sensor; inspect the fuel injectors and ignition system; and verify the accelerator pedal and associated sensors.