1989-90 models with the 2.3L engine, and 1990 4.0L engines use a distributorless ignition system. All other models use a distributor ignition system.
REMOVAL & INSTALLATION
- As a precaution, label all of the spark plug wires with their perspective cylinder number.
- Loosen the cap hold-down screws.
- Remove the cap by lifting straight up to prevent damage to the rotor blade and spring.
If the plug wires do not have enough slack to allow cap removal, confirm that they are properly labeled and remove them from the cap.
- Installation is the reverse of the removal procedure. Note the position of the square alignment locator and tighten the hold-down screws to 18-23 inch pounds (2.0-2.6Nm)
- Remove the distributor cap.
- Pull straight up on the rotor to disengage it from the shaft and armature.
- Installation is the reverse of the removal procedure. Align the locating boss on the rotor with the hole on the armature, then insure that it is fully seated on the shaft.
See Figure 1
- Wash the inside and outside surfaces of the cap with soap and water then dry it with compressed air.
- Inspect the cap for cracks, broken or worn carbon button, or carbon tracks. Also inspect the cap terminals for dirt and corrosion.
- Replace the cap if any of the above conditions are observed.
See Figure 2
- Wash the rotor with soap and water then dry with it compressed air.
- Inspect the rotor for cracks, carbon tracks, burns or damage to the blade or spring.
- Replace the rotor if any of the above conditions are observed.