Pressure

Fuel pressure is about 5800.0 hPa to 6100.0 hPa when the pump is running

Read out the fuel high-pressure actual value in the DME control unit using the PIWIS Tester.
- Switch on ignition, activate fuel pump briefly, then switch off the fuel pump.
- 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.