Jeep Cherokee

 Service Manual

Ignition system » Diagnosis and testing
Distributor rotor-2.5L engine

Visually inspect the rotor (Fig. 10) for cracks, evidence of corrosion or the effects of arcing on the metal tip. Also check for evidence of mechanical interference with the cap. Some charring is normal on the end of the metal tip. The silicone-dielectricvarnish- compound applied to the rotor tip for radio interference noise suppression, will appear charred.

This is normal. Do not remove the charred compound.

Test the spring for insufficient tension.

Replace a rotor that displays any of these adverse conditions.

Fig. 9 Cap Inspection-Internal-Typical

1 - CHARRED OR ERODED TERMINALS
2 - WORN OR DAMAGED ROTOR BUTTON
3 - CARBON PATH

Fig. 10 Rotor Inspection-Typical

1 - INSUFFICIENT SPRING TENSION
2 - CRACKS
3 - EVIDENCE OF PHYSICAL CONTACT WITH CAP
4 - ROTOR TIP CORRODED

Distributor cap-2.5L engine

Distributor rotor-2.5L engine

Spark plug cables

Spark plug conditions

Ignition switch and key lock cylinder