Mitsubishi Eclipse 1990-1998 Repair Guide

Ignition Coil Pack

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SECONDARY SPARK TEST



The best way to perform this procedure is to use a spark tester (available at most automotive parts stores). Two types of spark testers are commonly available. The neon bulb type is connected to the spark plug wire and flashes with each ignition pulse. The air gap type must be adjusted to the individual spark plug gap specified for the engine. This type of tester allows the user to not only detect the presence of spark, but also the intensity (orange/yellow is weak, blue is strong).

  1. Disconnect a spark plug wire at the spark plug end.
  2.  
  3. Connect the plug wire to the spark tester and ground the tester to a good ground on the engine.
  4.  
  5. Crank the engine and check for spark at the tester.
  6.  
  7. If spark exists at the tester, the ignition system is functioning properly.
  8.  
  9. If spark does not exist at the spark plug wire, remove the distributor cap and ensure the rotor is turning when the engine is cranked.
  10.  
  11. If the rotor is turning, perform the spark test again using the ignition coil wire.
  12.  
  13. If spark does not exist at the ignition coil wire, test the ignition coil, power transistor and related wiring. Repair or replace components as necessary.
  14.  

COIL TESTING



1990 2.0L Engines

See Figure 1

  1. Disconnect the negative battery cable and ignition coil harness connector.
  2.  
  3. Measure the primary coil resistance as follows:
    1. Measure the resistance between terminals 4 and 2 (coils at the No. 1 and No. 4 cylinder sides) of the ignition coil, and between terminals 4 and 1 (coils at the No. 2 and No. 3 cylinder sides).
    2.  
    3. Compare reading to the desired primary coil resistance of 0.77-0.95 ohms.
    4.  

  4.  



Click image to see an enlarged view

Fig. Fig. 1: Measuring the primary ignition coil resistance-2.0L engines, except 1995-98 non-turbo engines

  1. Measure the coil secondary resistance as follows:
    1. Disconnect the connector of the ignition coil.
    2.  
    3. Measure the resistance between the high-voltage terminals for the No. 1 and No. 4 cylinders, and between the high-voltage terminals for the No. 2 and No. 3 cylinders.
    4.  
    5. Compare the measured resistance to the desired secondary coil resistance of 10.3-13.9 kilo-ohms.
    6.  

  2.  
  3. If the readings are not within the specified value, replace the ignition coil.
  4.  

1991-98 2.0L Engines
EXCEPT 1995-98 2.0L NON-TURBO ENGINES

See Figures 1 and 2

  1. Disconnect the negative battery cable and ignition coil harness connector.
  2.  
  3. Measure the primary coil resistance as follows:
    1. Measure the resistance between terminals 3 and 2 (coils at the No. 1 and No. 4 cylinder sides) of the ignition coil, and between terminals 3 and 1 (coils at the No. 2 and No. 3 cylinder sides).
    2.  
    3. Compare reading to the desired primary coil resistance of 0.70-0.86 ohms.
    4.  

  4.  
  5. Measure the coil secondary resistance as follows:
    1. Detach the connector from the ignition coil.
    2.  
    3. Measure the resistance between the high-voltage terminals for the No. 1 and No. 4 cylinders, and between the high-voltage terminals for the No. 2 and No. 3 cylinders.
    4.  
    5. The desired secondary coil resistance is 11.3-15.3 kilo-ohms.
    6.  

  6.  



Click image to see an enlarged view

Fig. Fig. 2: Measuring ignition coil secondary resistance-1991-98 2.0L engines, except 1995-98 2.0L non-turbo

  1. If the readings are not within the specified value, replace the ignition coil.
  2.  

1995-98 2.0L NON-TURBO ENGINES

See Figures 3, 4 and 5

  1. Disconnect the negative battery cable.
  2.  
  3. To check the primary coil resistance, perform the following:
    1. Detach the electrical connector from the coil pack.
    2.  
    3. Measure the primary resistance of each coil. At the coil, connect an ohmmeter between the B+ pin and the pin corresponding to the questionable cylinder.
    4.  
    5. If the resistance is not between 0.51-0.61 ohms, replace the ignition coil.
    6.  

  4.  



Click image to see an enlarged view

Fig. Fig. 3: Terminal identification for measuring primary coil resistance-1995-98 2.0L non-turbo engine

  1. To check the secondary coil resistance, perform the following:
    1. Tag and disconnect the spark plug wires from the ignition coil.
    2.  
    3. Measure the secondary resistance of the coil between the towers of each individual coil.
    4.  
    5. If the resistance is not between 11.5-13.5 kilo-ohms, replace the ignition coil.
    6.  

  2.  



Click image to see an enlarged view

Fig. Fig. 4: Measuring the secondary ignition coil resistance between the No. 1 and No. 4 cylinders



Click image to see an enlarged view

Fig. Fig. 5: Measuring the secondary ignition coil resistance between the No. 2 and No. 3 cylinders

2.4L Engines

See Figures 6 and 7

  1. Disconnect the negative battery cable.
  2.  
  3. To check the primary coil resistance, perform the following:
    1. Detach the electrical connector from the coil pack.
    2.  
    3. Measure the primary resistance between the ignition coil connector terminals.
    4.  
    5. If the resistance is not between 0.74-0.90 ohms, replace the ignition coil.
    6.  

  4.  



Click image to see an enlarged view

Fig. Fig. 6: Measure the primary coil resistance between the connector terminals-2.4L engine

  1. To check the secondary coil resistance, perform the following:
    1. Tag and disconnect the spark plug wires from the ignition coil.
    2.  
    3. Measure the secondary resistance of the coil between the towers of each individual coil.
    4.  
    5. If the resistance is not between 20.1-27.3 kilo-ohms, replace the ignition coil.
    6.  

  2.  



Click image to see an enlarged view

Fig. Fig. 7: Measure the secondary resistance between the towers of the coil-2.4L engine

REMOVAL & INSTALLATION



See Figures 8, 9, 10, 11, 12 and 13

  1. Disconnect the negative battery cable.
  2.  



Click image to see an enlarged view

Fig. Fig. 8: The ignition coil has the corresponding cylinder numbers stamped into it

  1. Tag and disconnect the spark plug wires from the ignition coil. When pulling the wire from the coil, grip the boot and not the cable.
  2.  



Click image to see an enlarged view

Fig. Fig. 9: Tag and disconnect the spark plug wires from the ignition coil

  1. If necessary, pull up on the electrical connector locking tab, then unplug the coil connector.
  2.  



Click image to see an enlarged view

Fig. Fig. 10: Pull up on the connector locking tab, then unplug the ignition coil electrical connector

  1. Unfasten the ignition coil mounting bolts/screws, then remove the coil from the engine.
  2.  



Click image to see an enlarged view

Fig. Fig. 11: Use an extension to better access the ignition coil mounting bolts



Click image to see an enlarged view

Fig. Fig. 12: Remove the ignition coil mounting bolts ...



Click image to see an enlarged view

Fig. Fig. 13: ... then remove the ignition coil assembly from the vehicle

  1. Installation is the reverse of the removal procedure.
  2.  
  3. Tighten the ignition coil mounting bolts to the following specifications:
    1. 1990-94 2.0L engines: 14-20 ft. lbs. (20-27 Nm).
    2.  
    3. 1995-98 2.0L non-turbo engines: 9 ft. lbs. (12 Nm).
    4.  
    5. 1995-98 2.0L turbo and 2.4L engines: 10 ft. lbs. (14 Nm).
    6.  

  4.  

 
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