What is the reason why the heavy truck Howe EFI car can't refuel?
2. The fuel injector is blocked.
3. When the car is cold, the temperature detected by the engine oil sensor does not match the engine temperature.
4, atmospheric pressure sensor signal failure.
First, check whether there is a code report and connect it to the detector. No historical fault codes and current fault codes were found. Because the owner came by bike, it is still hot, and the temperature sensor data will be measured when the car is cold.
In order to save time, first measure the fuel pressure, drain the residual pressure of the fuel pump, connect the fuel pressure gauge and open the electric door lock. The initial oil pressure is 2.5 kg, which belongs to the normal range.
The reason why the EFI electronic control diesel engine can't refuel and the speed can't be raised depends on the brand and model of the diesel engine, and the faults of different models are not exactly the same.
The task of EFI electronically controlled diesel engine is to electronically control the fuel injection system and realize the real-time control of fuel injection quantity and timing with working conditions. Sensors such as rotational speed, accelerator pedal position, fuel injection time, intake temperature, intake pressure, fuel temperature and cooling water temperature are adopted.
When the hand pump pumps oil, a small amount of diesel oil should flow out from the outlet of the high-pressure oil pump, which is normal. If there is no diesel oil flowing out, it is abnormal. Whether there is oil flowing out of the high-pressure oil pump during the automobile start-up depends on the opening of the relay unit (generally around 7%) after the key is electrified.
Whether the opening of relay unit is in the range of 16%-24% during the vehicle starting process and whether the pressure limiting valve of * * * rail leaks during the vehicle starting process, two important data need to be checked: rail pressure; The actual rail pressure during startup should be higher than 20 MPa. If the rail pressure is lower than 20 MPa, it cannot be started.