What's wrong with the n-speed BMW x 1?

The reason why BMW x 1 hangs N speed may be that the throttle is slightly stagnant. The neutral speed suddenly increased, which may be due to a problem with the throttle of the car. There are some plugs and sensors on the throttle. If these plugs are poorly contacted or the sensor fails, the vehicle will suddenly accelerate in neutral.

Throttle is a device to control the intake of engine. Usually when we step on the gas pedal, we actually control the gas pedal. The accelerator pedal does not directly control fuel injection, but controls the intake of the engine. The more intake air, the more fuel injection.

The reason for the sudden increase of vehicle speed in neutral.

1, the cause of the failure of the carbon canister solenoid valve When we put the vehicle into neutral, the engine should return to the idle state, and the carbon canister solenoid valve should be closed at this time. If the solenoid valve is not closed or closed loosely, the gasoline vapor in the carbon canister will be transported to the intake pipe and then burned in the cylinder, resulting in sudden acceleration in neutral.

2. The cause of the brake system vacuum sensor failure. If the vacuum sensor fails, it is impossible to detect whether the vacuum degree of the booster is sufficient. At this time, the engine will increase the speed to increase the suction of the engine and improve the vacuum degree of the intake pipe.