H3 2006

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation



3.5L & 3.7L Engines
  1. Relieve the fuel system pressure.
  2.  
  3. Disengage the fuel feed quick connect locking clip.

    Click image to see an enlarged view

    Fig. Disengage the fuel feed quick connect locking clip

  4.  
  5. Disconnect the fuel feed line from the fuel rail.
  6.  
  7. Disconnect the Evaporative Emission (EVAP) purge hose from the following:

    Click image to see an enlarged view

    Fig. Disconnect the EVAP purge hose (1) from the throttle control module (2) and EVAP canister purge solenoid valve (3)



    The throttle control module
     
    The EVAP canister purge solenoid valve
     

  8.  
  9. Remove the intake manifold.
  10.  
  11. Disconnect the fuel injector harness connector from the engine wiring harness electrical connector.

    Click image to see an enlarged view

    Fig. Disconnect the fuel injector harness connector from the engine wiring harness electrical connector

  12.  
  13. 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.
  14.  
  15. Remove the fuel rail bolts.
    CAUTION



    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.
     

  16.  
  17. Remove the fuel rail from the cylinder head.
  18.