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Old 12-13-2012, 01:34 PM   #1
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Spark Plug/wire recommendation

Hey All,

The Jeep's been running pretty rough lately so i thought i might change out the spark plugs and wires sometime soon. They havent been changed for about 40-50k miles, at least according to the notes in the user manual from the PO. Anyway, any recommendations on brands of plugs and wires? Is it recommended to do the distributor cap as well? I live in an apartment complex so is this something id be able to do in my parking spot? I think yes right? Thanks in advance.

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Old 12-13-2012, 01:44 PM   #2
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Yes you will be able to do this in your parking spot no problem. I just replaced my plugs 3 days ago. I used NGK Platinum. The whole process should be able to be completed in under an hour.

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Old 12-13-2012, 01:51 PM   #3
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Very cool. thanks.
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Old 12-13-2012, 02:59 PM   #4
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Three really good plugs for your '98 TJ include the Autolite AP-985, Champion 3034, or Autolite XP-985. The first two are platinums that are good for 100K miles, the last is iridium which will likely perform well for 200k miles.

Yep it'd be good to replace the distributor cap, rotor, and wires too. For the cap and rotor, try to find replacements that have brass contacts. Those with aluminum contacts are cheaper and won't last as long.

For the ignition wiring, there is a lot of junk-science out there. The main thing to keep in mind is to avoid the so-called "low resistance" ignition wiring sets. Yes I know that low resistance sounds good but in the case of ignition wiring, it's not. In fact, the manufacturers add extra resistance to ignition wiring at additional cost to insure the wiring doesn't produce static/interference that can be heard on the radio or CB radio, or create problems for the ECM (engine computer). It actually costs less to produce "low resistance" wiring which just creates noise & problems. The best performance/best quality ignition wiring you can install is actually the OEM stuff that you can get from the dealer. If you know what you're looking for, it's possible but VERY difficult to find good quality ignition wiring at the auto parts store. Personally I would go right to the dealer for the ignition wiring, the stuff sold in the auto parts stores is often junk and at best, a real crap shoot.
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Old 12-13-2012, 08:45 PM   #5
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Hey Jerry,
Would there be any wiring sets from Rock Auto you would/could recommend?
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Old 12-13-2012, 08:58 PM   #6
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I run a double platinum in mine and a premium wire set that most auto part stores carry a cheep and a premium and runs great
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Old 01-12-2013, 05:57 PM   #7
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Goto NAPA for the wires... LIFETIME WARRANTY on the Beldin (napa brand) Wires... I worked at NAPA about a year ago for 3 years, and never heard of any problems with our wires... and as far as our store went.. no questions asked if you buy new wires and send back your old ones defective... so you'd never have to buy spark plug wires again...
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Old 01-12-2013, 06:06 PM   #8
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Quote:
Originally Posted by bostiguy View Post
Hey Jerry,
Would there be any wiring sets from Rock Auto you would/could recommend?
Sorry just saw this... the only brand-name I'd run from Rock Auto's list is AC-Delco... but I'd rather run the OE Mopar wiring set.

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