Pressure

Fuel pressure is approx. 5500.0 hPa to 5800.0 hPa when the pump is running.

Read out the fuel high pressure actual value in the DME control unit using the PIWIS Tester.
- Nominal pressure is approx. 5000 to 5500.0 hPa. Monitor the fuel pressure for about 5 to 10 minutes.
- The pressure is not maintained. In other words: the fuel high pressure actual value has dropped considerably. There is an internal or external leak in the fuel system.
- The pressure is maintained. In other words: the fuel high pressure actual value has only dropped slightly.