Century, Grand Prix, Impala, Intrigue, Lumina, Monte Carlo, Regal 2001-2005

Fuel Injectors

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Removal & Installation



3.1L & 3.4L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Upper intake manifold
     
    Fuel inlet and return lines
     
    Fuel injector electrical connectors
     
    Coolant temperature sensor electrical connector
     
    Fuel rail
     
    Fuel injector retaining clips
     
    Fuel injectors
     

  6.  

To install:

  1. Coat the new fuel injector O-rings with clean engine oil.
  2.  
  3. Install or connect the following:

    Lower backup O-ring
     
    Upper O-ring
     
    Lower O-ring
     
    Fuel injector
     
    Fuel injector retaining clips
     
    Fuel rail and torque the bolts to 7 ft. lbs. (10 Nm)
     
    Coolant temperature sensor electrical connector
     
    Fuel injector electrical connectors
     
    Fuel inlet and return lines with new O-rings and torque the fittings to 13 ft. lbs. (17 Nm)
     
    Upper intake manifold and torque the bolts to 18 ft. lbs. (25 Nm)
     
    Negative battery cable
     

  4.  
  5. Start the vehicle and check for leaks, repair if necessary.

    Click image to see an enlarged view

    Fig. Exploded view of the fuel injector-3.1L and 3.4L engines

  6.  

3.5L & 3.8L Engines
  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Fuel injector sight shield
     
    Fuel feed and return lines
     
    Fuel pressure regulator vacuum connection
     
    Ignition coil wires from the coil
     
    Fuel injector electrical connectors
     
    Fuel rail
     
    Fuel injector retaining clips
     
    Fuel injectors
     

  6.  

To install:

  1. Coat the new fuel injector O-rings with clean engine oil.
  2.  
  3. Install or connect the following:

    Lower backup O-ring
     
    Upper O-ring
     
    Lower O-ring
     
    Fuel injector
     
    Fuel injector retaining clips
     
    Fuel rail and torque the bolts to 7 ft. lbs. (10 Nm) if equipped with bolt retainers. If equipped with snap-lock tabs retainers, push down until the retainers snap into place.
     
    Fuel injector electrical connectors
     
    Ignition coil wires to the coil
     
    Fuel pressure regulator vacuum connection
     
    Fuel feed and return lines
     
    Negative battery cable
     

  4.  
  5. Start the vehicle and check for leaks, repair if necessary.
  6.  
  7. Install the fuel injector sight shield and torque the nuts to 27 inch lbs. (3 Nm).
  8.  

 
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