Driver side of engine is odds from radiator to fire wall is 1-3-5-7
Passenger side from radiator back is evens 2-4-6-8-
FIRING ORDER IS 1-8-4-3-6-5-7-2-
SOURCE: change sparks plug wires on my 2002 yukon denaili
YOU NEED A SPARK PLUG BOOT PULLER TO REMOVE PLUGS WIRES.
SOURCE: spark plug wires are arcing
If the wires are arcing that means that they need to be changed they have worn out and they can no longer keep the high voltage inside the wire just replace them about $100 and all your problems will be solved
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