Toyota
Dodge Durango
 Service Manual
Ignition System » Diagnosis and testing
Distributor cap

Remove the distributor cap and wipe it clean with a dry lint free cloth. Visually inspect the cap for cracks, carbon paths, broken towers or damaged rotor button (Fig. 9) or (Fig. 10). Also check for white deposits on the inside (caused by condensation entering  entering the cap through cracks). Replace any cap that displays charred or eroded terminals. The machined surface of a terminal end (faces toward rotor) will indicate some evidence of erosion from normal operation.

Examine the terminal ends for evidence of mechanical interference with the rotor tip.

Fig. 9 Cap Inspection-External-Typical Fig. 9 Cap Inspection-External-Typical

1 - BROKEN TOWER

2 - DISTRIBUTOR CAP

3 - CARBON PATH

4 - CRACK

Fig. 10 Cap Inspection-Internal-Typical Fig. 10 Cap Inspection-Internal-Typical

1 - CHARRED OR ERODED TERMINALS

2 - WORN OR DAMAGED ROTOR BUTTON

3 - CARBON PATH

    More about «Diagnosis and testing»:

    Distributor cap

    Distributor rotor

    Spark plug cables

    Spark plug conditions

    Ignition switch and key lock cylinder

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