MBE 4000 DDEC VI Troubleshooting – Section 5.12 High Fuel Pressure Test

Section 5.12
High Fuel Pressure Test

Check as follows:‪

1. Tee in a pressure gauge into the return line after the fuel pressure regulator.
2. Start the engine and monitor the gauge.
3. Is the pressure reading on the gauge above 21 kPa (3 psi)?
   1. If yes, check the fuel return line for damage (kinked, internally collapsed, or bent closed). If damaged, repair as needed.
   2. If no, replace the fuel pressure regulator.