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 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, then use an ohmmeter to measure the resistance.
For 1995 vehicle the resistance should be 250-1,000 ohms per inch or 3,000-12,000 ohms per foot.
For 1996-99 SOHC engines, the resistance should be follows:
- Cables #1 and #4: 3,500-4,900 ohms.
- Cables #2 and #3: 2,950-4,100 ohms.
For 1996-99 DOHC engine, the resistance should be as follows:
- Cables #1 and #4: 3,050-4,250 ohms.
- Cables #2 and #3: 2300-3,300 ohms.
If resistance falls outside of specifications, the cable(s) should be replaced with new ones.
REMOVAL & INSTALLATION
See Figure 2
As the spark plug wires must be routed and connected properly, if all of the wires must be disconnected from the spark plugs or from the ignition coil pack at the same time, be sure to tag the wires to assure proper reconnection.
When installing a new set of spark plug wires, replace the wires one at a time so there will be no mix-up. Start by replacing the longest cable first. Twist the boot of the spark plug wire 1 / 2 turn in each direction before pulling if off. Install the boot firmly over the spark plug. Route the wire exactly the same as the original. Insert the nipple firmly onto the tower on the ignition coil. Be sure to apply silicone dielectric compound to the spark plug wire boots and tower connectors prior to installation.
When installing the wires, on SOHC engines, make sure the dual plastic clip holds the #1 and #2 cables off of the valve cover and that the PCV hose plastic clip holds the #3 cable away from the metal PCV clamp and edge of air duct. On DOHC engines, make sure the plastic clip on the PCV hose is positioned so the cable clip is beneath the hose, and that the #1 cable is snapped into this clip to protect it from the metal PCV clamp.