For 1990-2009 cars only
- Check the routing of the wires. Improper routing can cause crossfiring.
- Check each wire for any signs of cracks, burns, damage, or splits in the wire.
- Inspect each boot for signs of tears, piercing, arc through, or carbon tracking. If the boot needs to be replaced, twist it a half turn in either direction to break the seal before pulling on the boot in order to remove the wire.
- With the engine ON, Inspect for any arcing to ground or other components.
- Connect an ohmmeter to the end of each suspect wire. If the meter reads over 30,000 ohms, replace the wire.
