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Old 10-30-2012, 01:13 PM   #1
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Join Date: Jun 2012
Location: Western Kentucky
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Spark plug wires

I tried to take my spark plug wires off today so I could check the spark plugs. I've had the jeep for about 4 months and unsure when they have been replaced or if ever. First what color would the factory wires be? My current wires are red with black boots. If I can get the wires/boot off without breaking them will the factory plugs be stamped indicating they are factory? Also what is the best way to get the boots off the plugs? I tried just grabbing them and a little wiggle but was a no go. Last question is should I changed the plug wires and cap and rotor when I change the plugs if needed? Sorry for the list of questions I just don't want to be wasting money. I'm the third owner of this 1999 4.0 TJ and it has 116,000 miles

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Old 10-30-2012, 01:57 PM   #2
Knows a couple things...

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Those are aftermarket ignition wires, the factory wires are all black. Due to how hot the engine compartment and the spark plugs get, the ignition wiring boot can be very tough to remove from the spark plug. After years of struggling with that, I finally bought a spark plug boot removal tool which is like an angled set of pliers and it makes that part of the job much easier.

If you end up destroying/pulling apart your ignition wires changing your plugs, which is common with many poorly constructed aftermarket ignition wires, I would replace them with the OE wires from the dealer. Many aftermarket parts are highly desirable but on things like the ignition wires, sensors, water pumps, starter motors, etc., I always strongly recommend the OE parts from the dealer due to their generally superior quality and longevity. Especially on the ignition wires since too many aftermarket ignition wire sets just cause problems like with radio static or they are so shoddily made they pull apart the next time you go to remove them.

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Old 10-31-2012, 01:34 AM   #3
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Good deal, I'll look into that. I really just want to see what's under the boots. Check the gaps and see what I'm working with.
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