Subaru Forester 1998-05

Ignition Coils

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Removal & Installation



2.5L Non-Turbo Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Disconnect the spark plug wires from the ignition coil.
  4.  
  5. Disconnect the electrical connector from the ignition coil.
  6.  
  7. Unbolt and remove the ignition coil and ignitor assembly.
  8.  
  9. Installation is the reverse order of assembly. Tighten the ignition coil mounting bolts to 5 ft. lbs. (7 Nm).
  10.  

2.5L Turbo Engines

NOTE
This engine uses a direct ignition system with one ignition coil mounted for each cylinder.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the lower air intake assembly.
  4.  
  5. Disconnect the electrical connector form the ignition coil.
  6.  
  7. Disconnect the washer motor connectors, unbolt the washer tank mounting bolts and move the washer tank upward, if removing the left side spark plugs.
  8.  
  9. Unbolt and remove the ignition coil.

    Click image to see an enlarged view

    Fig. Unbolt the mounting bolts to remove the ignition coil-2.5L Turbo Engine

  10.  

Testing



2.5L Non-Turbo Engines
  1. Using an accurate ohmmeter, check the primary and secondary resistance as follows:
    1. Between No. 1 and No. 2-0.69 ohms (+/-) 10%
    2.  
    3. Between No. 2 and No. 3-0.69 ohms (+/-) 10%
    4.  
    5. Between terminals (A) and (B)-21.0 k ohms (+/-) 15%
    6.  
    7. Between terminals (C) and (D)-21.0 k ohms (+/-) 15%

      Click image to see an enlarged view

      Fig. Checking the resistance of the ignition coil assembly-1998 engines

    8.  

  2.  

  1. Using an accurate ohmmeter, check the primary and secondary resistance as follows:
    1. Between No. 1 and No. 2-0.73 ohms (+/-) 10%
    2.  
    3. Between No. 2 and No. 3-0.73 ohms (+/-) 10%
    4.  
    5. Between terminals (A) and (B)-12.8 k ohms (+/-) 15%
    6.  
    7. Between terminals (C) and (D)-12.8 k ohms (+/-) 15%
    8.  

  2.  

  1. Using an accurate ohmmeter, check the secondary resistance as follows:
    1. Between terminals (A) and (B)-11.2k ohms (+/-) 15%
    2.  
    3. Between terminals (C) and (D)-11.2k ohms (+/-) 15%

      Click image to see an enlarged view

      Fig. Check the resistance on the primary side of the ignition coil assembly-1999-2004 engines



      Click image to see an enlarged view

      Fig. Check the resistance on the secondary side of the ignition coil assembly-1999-2005 engines

    4.  

  2.  

 
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