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Unread 11-27-2013, 12:20 AM   #1
Jayzer97
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which spark plugs work best

I gots the 1997 grand Cherokee limited v8 5.2 ...and wanted to know in wats the best spark plugs lemme know thanks

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Unread 11-27-2013, 12:26 AM   #2
kg6mov
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I think number 4 is firing best in my 5.2 right now and the 3 or 6 one in the niner is best for it.

Kolak has a good ignition upgrade if you are looking to do plugs, wires, coil, etc and really get it running smooth.

I think he recommends autolite, but for stock a lot of people recommend champion. Copper plugs seems to be the popular opinion.
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Unread 11-27-2013, 12:35 AM   #3
newfieZJ
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I would recommend the stock Champion copper core plug .

I run NGK FR-5's in my 5.2 and they work good .

Run Autolites in my 5.9 , they work good , but I was getting better mpg's with the Bosch plugs the PO installed . Not recommending Bosch plugs , just saying .

Run Champion double platinum's in my wife's 5.9 . Second set now , took 35k from the first set w/o issue . Also running an ignition upgrade via MSD on this jeep . Kinda wish I would have got these for my 5.9 , great product IMO .

Champion , Autolite , or NGK , all good choices
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Unread 11-27-2013, 07:04 AM   #4
Uniblurb
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I run the good ole Champion copper plugs in all my Jeeps and they seem to work the best.
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Unread 11-27-2013, 08:05 AM   #5
JasonStebbins
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Quote:
Originally Posted by Uniblurb View Post
I run the good ole Champion copper plugs in all my Jeeps and they seem to work the best.
Same here. It didn't seem as smooth with the AutoLites that were in it before.
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Unread 11-27-2013, 09:03 AM   #6
zjosh93
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I've had Autolite, Autolite platinum, Autolite double platinum, Champion copper, NGK, and currently Autolite racing (copper core, just thicker and shorter ground strap). They all seem to work about the same. I change them every year though.
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Unread 11-27-2013, 09:14 AM   #7
PolkaPower
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Anything copper. None of that platinum or unobtanium crap.
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Unread 11-27-2013, 09:45 AM   #8
pageman
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i use the ngk twin platnum. they are only like 3$ each and are a better in the ranks of good better best. im not paying for duble iridium plugs on my weekend jeep its not happening. now you have to gap all your plugs. every plug from advanced iv gotten that was pre gapped was of by.010 it should say the proper gap on the plaqard on the radiator support. i belive kolac recomemnded a colder range plug than factory with his mods
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