GM Corvette 1984-1996 Repair Guide

Ignition Coil

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TESTING



See Figure 1

  1. Tag and detach the spark plug wires, and unplug the electrical connectors from the distributor cap and coil.
  2.  
  3. Use a screwdriver to turn the 4 latches, then remove the cap and coil assembly from the lower distributor housing.
  4.  
  5. Connect an ohmmeter, as shown in test 1, in the accompanying figure. The reading should be zero, or nearly zero. If not, replace the ignition coil.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Connect the ohmmeter as shown to test the ignition coil

  1. Using the high scale, connect the ohmmeter both ways, as shown in test 2 in the accompanying figure. The readings should NOT be infinite. Replace the coil ONLY if both readings are infinite.
  2.  
  3. If the coil is good, test the pick up coil, as outlined later in this section.
  4.  

REMOVAL & INSTALLATION



See Figures 2 and 3

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the intake manifold plenum extension.
  4.  
  5. Tag and disconnect the secondary wires, then remove the retainer(s) from the distributor cap, and position aside.
  6.  
  7. Unfasten the 2 coil cover attaching screws, then lift the cover off.
  8.  
  9. Remove the 4 coil-to-cap attaching screws and lift the ignition coil and leads from the cap.
  10.  



Click image to see an enlarged view

Fig. Fig. 2: The ignition coil is secured to the distributor cap with 4 screws



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Fig. Fig. 3: View of the ignition coil removed from the distributor cap

  1. Remove the ignition coil arc seal.
  2.  
  3. Clean the cap with a soft cloth and inspect for defects. Replace if necessary.
  4.  

To install:
  1. Place a new seal on the distributor cap.
  2.  
  3. Position the ignition coil to the distributor cap and secure with the retaining screws. Tighten the screws to 13 inch lbs. (1.5 Nm).
  4.  
  5. Attach the coil electrical leads.
  6.  
  7. Install the distributor cap cover.
  8.  
  9. Attach the secondary wires, as tagged during removal and install the retainer(s).
  10.  
  11. Install the intake manifold plenum extension.
  12.  
  13. Connect the negative battery cable.
  14.  

 
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