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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.2L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSFUEL RAIL ASSEMBLY REPLACEMENTINSTALLATION PROCEDURE
2006 Isuzu Ascender S, 5.3 M, 4WD

Installation Procedure

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Installation Procedure
WARNING: This page is about a different variant/trim than selected.
    Fig 1: Lower Injector O-Ring Seals
    GM1483954Courtesy of GENERAL MOTORS CORP.
  1. Lubricate the new lower injector O-ring seals with clean engine oil.
  2. Install the new O-ring seals on the spray tip end of each injector.
    3. Fig 2: Fuel Rail Assembly
    GM1482970Courtesy of GENERAL MOTORS CORP.
  3. Install the fuel rail assembly (1).
    4. NOTE: Refer to Fastener Notice in Cautions and Notices.
  4. Apply a 5 mm (0.2 in) band of threadlock GM P/N 12345382 (Canadian P/N 10953489) or equivalent, to the threads of the fuel rail bolts (2).

    Install the fuel rail attaching bolts (2).

    Tighten:  Tighten the bolts to 10 N.m (89 lb in).

  5. Install the fuel injector harness in-line connector (3) to the rocker cover.
  6. Connect the fuel injector harness in-line connector (3) to the engine wire harness.
    7. Fig 3: Fuel Feed Pipe & Fuel Rail
    GM1368526Courtesy of GENERAL MOTORS CORP.
  7. Connect the fuel feed pipe (3) to the fuel rail (2). Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  8. Connect the fuel injector electrical connectors.
  9. Install the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
  11. Inspect for leaks.
    1. Turn ON the ignition, with the engine OFF for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition, with the engine OFF.
    4. Inspect for fuel leaks.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.