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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 REPLACEMENTREMOVAL PROCEDURE
2006 Isuzu Ascender S, 5.3 M, 4WD

Removal Procedure

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Removal Procedure
WARNING: This page is about a different variant/trim than selected.
IMPORTANT: An eight-digit identification number is located on the fuel rail. Refer to this model identification number if servicing or part replacement is required.
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief Procedure .
    2. Fig 1: Fuel Feed Pipe & Fuel Rail
    GM1368526Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the fuel feed pipe (3) from the fuel rail (2). Refer to Quick Connect Fitting(s) Service (Metal Collar) .
  3. Remove the intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.
  4. Before removal, clean the fuel rail assembly and the cylinder head with a spray type engine cleaner, GM X-30A or equivalent, if necessary. Follow the package instructions. Do not soak the fuel rail in liquid cleaning solvent.
    5. Fig 2: Fuel Injector Harness In-Line Connector
    GM1482970Courtesy of GENERAL MOTORS CORP.
  5. Disconnect the fuel injector harness in-line connector (3) from the engine wire harness.
  6. Remove the fuel injector harness in-line connector (3) from the rocker cover.
  7. Remove the fuel rail attaching bolts (2).
    8. NOTE:
    • Remove the fuel rail assembly carefully in order to prevent damage to the injector electrical connector terminals and the injector spray tips. Support the fuel rail after the fuel rail is removed in order to avoid damaging the fuel rail components.
    • Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering open pipes and passages.
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.