See Figure 1
At every tune-up/inspection, visually check the spark plug cables for burns cuts, or breaks in the insulation. Check the boots and the nipples on the distributor cap and/or coil. Replace any damaged wiring.
Every 50,000 miles (80,000 Km) or 60 months, the resistance of the wires should be checked with an ohmmeter. Wires with excessive resistance will cause misfiring, and may make the engine difficult to start in damp weather.
To check resistance, disconnect the spark plug wire from the plug and ignition coil or distributor, then use an ohmmeter to measure the resistance.
For 2.4L engines, the resistance should be as follows:
For 3.0L engines, the resistance should be as follows:
For 3.3L and 3.8L engines, the r