Recommened spark plugs and wires


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Old 02-09-2010, 03:38 PM   #1
kidcurrie
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Default Recommened spark plugs and wires

Can anyone recomend a good set of spark plugs and wires for good performance and better mpg ? I am a recent member and owner of a 98 cherokee classic 4.0 with a banks header and k&N cold air ducting.I just ordered a SLR performance chip for 70.00 dollars. They claim improved h.p. and mpg. I read somewhere that gapping your plugs at .045-.050 is a good thing ? any suggestions.


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Old 02-09-2010, 07:09 PM   #2
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I have had good luck with the napa belden plug wires champion truck plugs is what most jeepers recommend.
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Old 02-09-2010, 10:21 PM   #3
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I'm using the wires that Advance Auto sells not sure right off what the brand is. As for plugs, I tried Bosh and the XJ ran light s*it, put in a set of Champions and now it runs great.
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Old 02-10-2010, 10:19 AM   #4
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Thanks for your input I am hearing that bullet proof six likes good ole champion truck plugs. Theres no point in changing what works. Now I wonder if buying this performance chip is going to be worth while
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Old 02-13-2010, 06:42 PM   #5
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Quote:
Originally Posted by jeepride View Post
I have had good luck with the napa belden plug wires champion truck plugs is what most jeepers recommend.

I saw a set of the Napa Belden wires at a local oilfield buisness.
They impressed me so much i bought a set for my Bronco2.
GREAT wires! Top notch and made by the same co. that makes Champion plugs. (federal mogul)

Gonna use em in the 4.0 this spring along with Napa cap and rotor.
Napa IS the good stuff!

Plugs?
Not so sure.
Leaning towards Champion. most likely their double platinums?
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Old 02-14-2010, 05:45 AM   #6
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I can't comment on the performance chip. I never hear about them much on the forums so I guess the gains aren't what's desired for the money.


If you want guaranteed performance gains, upgrade the headers, exhaust, and intake (which u've done some already). If you got big tires on there, regear.

My jeep doesn't like other plugs much. It runs best on champions but I've been told of a TSB that recommends NGK plugs and they've been working well on my jeep. If you want to experiment with other high tech plugs, keep your receipt cuz you just might have to return them.
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Old 08-12-2010, 04:50 PM   #7
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I too tried the Bosch Platinum 4+ in my 98 XJ Classic and it ran like crap. So atthe recommendation of several Jeeper friends I put a set of Champion Double Platinum's back in it and now it SCREAMS while still getting 19city/22hwy. As for wires, I went with MSD Super Conductors. I'm running a JBA Header and a Spectre Cold Air Induction as well.
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Old 08-12-2010, 06:19 PM   #8
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Chrysler products come from the factory with Champion plugs, hence the reason they run so much better. I have a set of Accels and they actually run very well.
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Old 08-12-2010, 06:56 PM   #9
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For wires i would recomend the factory stuff, chrysler sells a kit that has wires, cap, and rotor for a decent price. These are the only wires I use now in my Jeeps and have never had an issue. I change them every 50,000 k's and they are still in good shape(no arching) when I take them off, I just do it as regular maintnence.

The part# for the kit is : SPC40604AA

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Old 08-12-2010, 07:09 PM   #10
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I have a JET performance chip stage 2 and have owned the stage 1 also........unles your vehicle is highly modified, you will not notice a lot of difference or maybe no difference at all. I am running Brand New 24# Ford Cobra Racing injectors on a 4.7 stroker engine with a lot of other mods too and I could see a worthwhile and noticeable difference but did not notice any difference before the mods and have heard a lot of other people did not notice a difference either before mods. Even with a high flow air filter and exhaust there was no diff. until I went extreme. I am not getting any worse fuel mileage than before the chip with those same mods and I did test it and the difference was an actual 1mpg better for a grad total of about 9.7 mpg
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Old 08-15-2010, 11:55 AM   #11
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Default Spark plugs

I run E3 plugs on mine and my sons like those plugs the best. also get 8.5 mm plug wires. cheapest place Ebay. havent had any problem with wire from ebay or the spark plugs from checker.
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Old 08-23-2010, 09:19 PM   #12
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Kinda out of place here, but what differnce do spark plugs really make? A spark is a spark to me and I dont get how one style is different from another of the same brand. Differnt brands makes some sense, but how are double platinum champions better than the cheapest ones by them?
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Old 08-24-2010, 11:18 AM   #13
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Quote:
Originally Posted by greenneck View Post
Kinda out of place here, but what differnce do spark plugs really make? A spark is a spark to me and I dont get how one style is different from another of the same brand. Differnt brands makes some sense, but how are double platinum champions better than the cheapest ones by them?
the only thing I have heard about these claims are that since Champion is the "moper plug" The head of our motors were designed with the Champion plug in mind. Apparently they are the exact right size for proper combustion and what not. Atleast that's what my buddy at Jeep told me.
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Old 11-20-2010, 07:12 AM   #14
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that is a good question. i just bought the champion 412 rc12lyc plugs todays. but i know bosch just doesnt run right in any car ive owned yet. even my girlfriends jetta doesnt like the nazi plugs
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Old 11-27-2010, 08:00 PM   #15
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since ive had mine i replace the plugs with the champs and the coil pack too. i still get that damn check engine light but only if i beat on her but since ive been in south jersey its been runnin good.


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