Nissan Quest 2001-02 and 2004-06

Fuel Injectors

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Removal & Installation



3.3L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. If removing a rear injector, remove the upper intake manifold.
  6.  
  7. Disengage the injector electrical connection.
  8.  


NOTE
Whenremoving the fuel injectors, use a screwdriver head socket to remove the injector cap screws.

  1. Remove the injector cap screws and the cap.
  2.  
  3. Pull the injector from the fuel rail.
  4.  
  5. Remove and discard the injector O-rings.
  6.  

To install:


NOTE
Use new insulators and O-ring seals for assembly.

  1. Install or connect the following:

    Fuel injectors with the rail and tighten the fasteners to 8-11 ft. lbs. (11-15 Nm)
     
    Fuel injector caps. Tighten the screws to 26-33 inch lbs. (3-4 Nm).
     
    Injector electrical connections.
     
    Intake manifold, if removed.
     
    Negative battery cable.
     

  2.  
  3. Start the vehicle and check for leaks.
  4.  


    Click image to see an enlarged view

    Fig. Exploded view of the fuel rail and injector assembly-3.5L engine


3.5L Engine
  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove the intake manifold collector.
  4.  
  5. Disconnect the fuel quick connector using tool J-45488 as follows:
    1. Remove the quick connector cap.
    2.  


      Click image to see an enlarged view

      Fig. Quick connector components-3.5L engine



      Click image to see an enlarged view

      Fig. Use tool J-45488 to disconnect the quick connector-3.5L engine

    3. With the sleeve side of tool facing quick connector, install the tool on to fuel tube.
    4.  

  6.  
  7. Insert Tool into quick connector until sleeve contacts and goes no further. Hold the tool in that position.
  8.  


CAUTION
Inserting the tool hard will not disconnect quick connector. Hold tool where it contacts and will go no further.

  1. Pull the quick connector straight out from the fuel tube. -Pull the quick connector holding it at the (A) position, as illustrated.
  2.  


NOTE
Do not pull with lateral force applied as the O-ring inside the quick connector may be damaged.

  1. Remove the fuel rail with the fuel injectors attached, from the intake manifold.
  2.  
  3. Remove the fuel injector O-rings and use new O-rings for installation.
  4.  

To install:

  1. Install the fuel rails with fuel injectors attached.
  2.  
  3. Install new O-rings. Lubricate the O-rings by lightly coating with new engine oil.
  4.  


NOTE
Be careful not to damage the O-rings and surfaces for O-ring sealing surfaces. Do not expand or twist O-rings.

  1. Install new clips, position the clips in grooves on the fuel injectors. Make sure that protrusions of the fuel injectors are aligned with the cutouts of clips after installation.
  2.  
  3. After properly inserting the fuel injectors onto the fuel tube assembly, check that the fuel tube protrusions are engaged with those of fuel injectors, and the flanges of the fuel tube assembly are fully engaged with the clips.
  4.  
  5. Tighten the fuel tube assembly bolts in the sequence illustrated, in two steps:
    1. Step 1: 89 inch lbs. (10 Nm).
    2.  
    3. Step 2: 16 ft. lbs. (22 Nm).
    4.  

  6.  
  7. Install the quick connector as follows:
    1. Make sure no dirt or foreign objects are around the tube and quick connector to avoid damage.
    2.  
    3. Align the center to insert the quick connector straight onto the fuel tube.
    4.  
    5. Insert the fuel tube until a click is heard.
    6.  

  8.  
  9. Install the remaining components is in the reverse of removal.
  10.  
  11. Make sure there is no fuel leakage at connections as follows:
    1. Apply fuel pressure to fuel lines by turning ignition switchONOFF
    2.  
    3. Start the engine and rev it up and check for fuel leaks at connections. Use mirrors for checking on connections out of the direct line of sight.
    4.  

  12.  


    Click image to see an enlarged view

    Fig. Position clips in grooves on the fuel injectors. Make sure that protrusions of fuel injectors are aligned with cutouts of clips after installation-3.5L engine



    Click image to see an enlarged view

    Fig. Tighten the fuel tube assembly bolts in this sequence-3.5L engine


 
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