Why hasn't the standard value of n55 throttle forward pressure changed?

N55 Standard value of pressure before throttling This is a fault reported by the deviation between the pressure value calculated in the computer and the actual value. Check the tightness of relevant pipelines, check the carbon deposit on the intake valve, clean it if it is too heavy, and check the computer version of the engine. If it is too low, it is recommended to program the vehicle. Generally, the idle motor of throttle is broken, which will lead to unstable idle speed or flameout after heavy throttle. The accelerator position sensor is broken, which generally affects emergency refueling.

Valve device

The valve device is an integral part of the engine valve train and plays a very important role in the engine work. The operation of fuel engine consists of four working processes: intake compression, work and exhaust. In order to keep the engine running continuously, these four working processes must be repeated. Two of the working processes, intake and exhaust, need to rely on the valve train of the engine to accurately transport combustible mixture or fresh air according to the working sequence of each cylinder, and discharge the burnt exhaust gas.