Infinity_QX4_1998-2003

Ignition Coil

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Removal & Installation



3.3L Engine

NOTE
The 2001 3.3L Engine is equipped with a distributorless ignition system, unlike earlier models which had a distributor.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the throttle wires.
  6.  
  7. Remove the air duct with air cleaner assembly.
  8.  
  9. Disconnect harness connectors and harness brackets around ignition coil sides.
  10.  
  11. If removing the No. 4 spark plug, remove the throttle body as outlined in the Fuel System Section.
  12.  
  13. Disconnect the ignition coil harness connectors.
  14.  
  15. Loosen ignition coil mounting bolts and pull out coil from intake manifold connector.

    Click image to see an enlarged view

    Fig. Left and right ignition coil banks-3.3L engine

  16.  

To install:

  1. Install the ignition coil and tighten the retainers to 75 - 95 inch lbs. (8.5 - 10.7 Nm).
  2.  
  3. Attach the ignition coil harness connectors.
  4.  
  5. If the No. 4 spark plug was removed, install the throttle body.
  6.  
  7. Install the harness brackets and connectors.
  8.  
  9. Install the air cleaner assembly and air duct.
  10.  
  11. Install the throttle wires.
  12.  
  13. Install the engine cover.
  14.  
  15. Connect the negative battery cable.
  16.  

3.5L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cover.
  4.  
  5. Remove the air duct with air cleaner assembly.
  6.  
  7. Disconnect the harness connectors and harness brackets around ignition coil sides.
  8.  
  9. Remove the electric throttle control actuator. (Only when removing the No. 4 cylinder spark plug)
  10.  
  11. Disconnect ignition coil harness connectors.
  12.  
  13. Loosen ignition coil mounting bolts and pull out coil from rocker cover.

    Click image to see an enlarged view

    Fig. Right bank ignition coil-3.5L engine



    Click image to see an enlarged view

    Fig. Left bank ignition coil-3.5L engine

  14.  

To install:

  1. Install the ignition coil and tighten the retainers to 76 - 95 inch lbs. (8.5 - 10.8 Nm).
  2.  
  3. Attach the ignition coil harness connectors.
  4.  
  5. If the No. 4 spark plug was removed, install the electric throttle control actuator.
  6.  
  7. Install the harness brackets and connectors.
  8.  
  9. Install the air cleaner assembly and air duct.
  10.  
  11. Install the engine cover.
  12.  
  13. Connect the negative battery cable.
  14.  

 
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