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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 562 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.2L - INTRODUCTION)REPAIR INSTRUCTIONSFUEL INJECTION FUEL 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 car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Locating Fuel Injector Lower 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: View Of Fuel Rail Assembly
    GM1482970Courtesy of GENERAL MOTORS CORP.
  3. Install the fuel rail assembly (1).
    4. CAUTION: Refer to Fastener Caution .
  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) and tighten 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: View Of Fuel Feed Pipe & Fuel Rail
    GM1368526Courtesy of GENERAL MOTORS CORP.
  7. Connect the fuel feed pipe (3) to the fuel rail (2). Refer to Metal Collar Quick Connect Fitting Service .
  8. Connect the fuel injector electrical connectors.
  9. Install the intake manifold. Refer to Intake Manifold Replacement .
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  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.