What exactly does the two lines of foot throttle do?

Hello, 1. Malfunction of oil intake metering solenoid valve: Many maintenance personnel deal with this malfunction by replacing the oil intake metering solenoid valve. This kind of thing is a typical headache. After replacing the oil metering solenoid valve, the fault can sometimes be solved, but it can't be solved in most cases.

2. Fuel injector failure: The main reason for this failure phenomenon is that the fuel injector is worn due to poor oil quality, which leads to abnormal fuel injection. ECU starts self-protection to limit the engine power output. Replacing the fuel injector can completely solve the problem.

3. The metering device is blocked or stuck: This situation is different from the above two situations. In the process of downhill deceleration, the engine enters the deceleration and fuel cut-off mode, so when the fuel injection of the injector is cut off, the intake metering solenoid valve should be completely closed at this time to prevent the rail pressure from rising continuously. However, if the metering unit is stuck and cannot be completely closed, the rail pressure will continue to rise and even the pressure limiting valve will be opened. The engine is running in a fail-safe state.

4. Design matching of Jiefang J6 before delivery: Some netizens mentioned that the parallel design of two filter elements of Jiefang Xichai 6D series engine affected the filtration quality. In addition, due to the replacement of unqualified filter element during maintenance, the quality of filtered diesel oil can not meet the design requirements, and the plunger or injector needle valve wears prematurely.

5. Diesel quality problems and maintenance problems: On the one hand, we all know the problems existing in domestic diesel quality. The second aspect is that the owner did not maintain it on schedule, did not replace the fuel filter in time or the quality of the replaced filter was unqualified.

I hope I can help you!