Section 5.11 No or Low Fuel Pressure Test

Section 5.11
No or Low Fuel Pressure Test

Check as follows:‪

  1. Remove the fuel suction line going to the fuel pump.
  2. Tee in a vacuum gauge into the pump and the line. Start/crank the engine over.
  3. Is the reading on the gauge greater than 1.5–3.0 kPa (6–12 in. H2 O)?
    1. If yes, check the suction line from the fuel pump to the fuel tank for a restriction (bent, kinked, or internally collapsed). If there is no damage, check the fuel filter, and get customer approval to replace the filters.
    2. If no, go to step 4 .
  4. Replace the fuel pressure regulator and retest the fuel pressure. If the fuel pressure is still not within specifications, refer to , “Fuel Pump Test.”


EPA07 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568
Generated on 10-13-2008

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