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Home >> GMC >> 2004 >> Envoy RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L (Introduction) >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Disconnecting/Connecting Fuel Pressure Regulator Vacuum Line
    GM730808Courtesy of GENERAL MOTORS CORP.
  1. Install the regulator filter.
  2. Install the new O-ring on the fuel pressure regulator.
  3. Lubricate the fuel pressure regulator O-ring with clean engine oil.
  4. Push the fuel pressure regulator into the regulator housing on the fuel rail.
    5. NOTE: Refer to Fastener Notice in Cautions and Notices.
  5. Install the fuel pressure regulator retainer.

    Tighten:  Tighten the regulator retainer screw to 8 N.m (71 lb in).

  6. Install the fuel return pipe retainer.

    Tighten:  Tighten the return pipe retainer screw to 8 N.m (71 lb in).

  7. Connect the fuel return pipe. Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  8. Connect the fuel pressure regulator vacuum line.
  9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  10. Inspect for leaks.
    1. Turn ON the ignition for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition.
    4. Inspect for fuel leaks.
  11. Install the engine wiring harness into the retaining clips at the front of the engine.
  12. Install the air intake resonator. Refer to Air Cleaner Outlet Resonator Replacement .
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