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Home >> Isuzu >> 2004 >> Ascender LS, 5.3 P, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls (Introduction) - 5.3L >> Repair Instructions >> Fuel Pressure Regulator Replacement >> Installation Procedure
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Installation Procedure

    Fig 1: Exploded View Of Fuel Rails & Injector Components
    GM350543Courtesy of GENERAL MOTORS CORP.
  1. Install the following parts onto the fuel pressure regulator (9), if necessary.
    • Backup ring (10)
    • Regulator seal O-ring (11)
    • Regulator filter (12)
    • Regulator seal O-ring (13)
  2. Lubricate the fuel pressure regulator large O-rings (11, 13) with clean engine oil.
  3. Install the fuel pressure regulator (9).
  4. Install a NEW fuel pressure regulator retainer (8).
  5. Connect the fuel pressure regulator vacuum line.
  6. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  7. Install the fuel fill cap.
  8. Inspect for leaks.
    1. Turn the ignition ON, for 2 seconds.
    2. Turn the ignition OFF for 10 seconds.
    3. Turn the ignition ON.
    4. Inspect for fuel leaks.
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