Chrysler Front Wheel Drive Cars 4-CYL 1981-1995 Repair Information

Ignition Coil Pack

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TESTING



Coil Test

See Figures 1 and 2

Coil one fires cylinders 1 and 4; coil two fires cylinders 2 and 3. Each coil tower is labeled with the number of the corresponding cylinder.

  1. Unplug the ignition cables from the coil terminals and the spark plugs. Make certain to label them before removal. Measure the resistance of the cables. Resistance must be between 3,000-12,000 ohms per ft. (30.5 cm) of cable. Replace any cable not within tolerance.
  2.  
  3. Unplug the electrical wiring harness connector from the coil pack.
  4.  



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Fig. Fig. 1: Primary resistance should be measured from the B+ terminal to the coil terminals, one at a time-resistance should be 0.5-0.7 ohms



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Fig. Fig. 2: Secondary resistance should be measured from each tower belonging to the same coil-cylinders 1 and 4 belong to one coil; cylinders 2 and 3 belong to another

  1. Measure the primary resistance of each coil. At the coil, connect an ohmmeter between the B+ pin and the pin corresponding to the cylinders in question. Resistance on the primary side of each coil should be 0.5-0.7 ohms. Replace the coil with a new one if the resistance is not within tolerance.
  2.  
  3. Remove the ignition cables from the secondary towers of the coil. Measure the secondary resistance of the coil between the towers of each individual coil. Resistance should be 11,600-15,800 ohms. If the coils' resistances are not within specifications, the coils must be replaced.
  4.  

REMOVAL & INSTALLATION



  1. Disconnect the negative (-) battery cable.
  2.  
  3. Unplug and label the spark plug cables from the coil pack.
  4.  
  5. Detach the electrical wiring harness connector from the coil pack.
  6.  
  7. Loosen and remove the coil mounting screws.
  8.  
  9. Remove the ignition coil from the engine.
  10.  

To install:
  1. Set the ignition coil back in place and secure with the mounting screws. The mounting screws should be tightened to 9 ft. lbs. (12 Nm).
  2.  
  3. Plug the electrical wiring harness connector back into the coil pack.
  4.  
  5. Attach the spark plug cables to the ignition pack, making certain the cables are attached to the correct coil towers.
  6.  
  7. Connect the negative battery cable.
  8.  

 
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