Faw-Volkswagen magotan fault code P0507, what is the speed of idle speed control system?

The content is as follows: Look at the gasoline pump. If it is closed after driving for a period of time, check the oil circuit. There should be no oil.

Check the fault code "0 1287, P0507, idle speed control system, speed is higher than expected" stored in the engine control unit, as shown in figure 1-28, so as to judge that the mixture is frequently enriched. Read the fuel injection quantity of data stream 1. 02 milliseconds, the throttle opening is 2.7%. These two values cannot lead to an increase in speed.

The air flow rate of reading data is 3.3g/s, and the air flow rate of 1 zone 32 is 7.4%, indicating that there is data calculation deviation in the intake system, which leads to intake deviation when the engine is idling. When the filler cap is opened, it is found that there is obvious vacuum suction at the cap, which indicates that the internal pressure regulating mechanism of the oil-gas separation device is stuck, so that the idle airflow channel is kept at a large opening, and a large amount of crankcase gas enters the combustion chamber, making the mixture too rich.