K Yukon/Denali 4WD V8-5.7L VIN R (2000)
Ignition Cable: Testing and Inspection
SPARK PLUG WIRES NOT OPERATING PROPERLY
1. Check the routing of the wires. Improper routing can cause crossfiring.
2. Check each wire for any signs of cracks, burns, damage, or splits in the wire.
3. 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.
4. With the engine ON, Inspect for any arcing to ground or other components.
5. Connect an ohmmeter to the end of each suspect wire. If the meter reads over 30,000 ohms, replace the wire.
