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Old 01-25-2008, 11:17 AM   #1
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Spark plug questions

I just ordered the Mopar OEm high performance spark plug wires (because i work for acura but one of our other dealerships is Jeep) i got them because i got a good deal on them, but i was wondering what spark plugs everybody uses around here i have alwaus used champions before but i dont know whatelse people put in their TJ's, i always used them in my ZJ, so which ones would be the best for my rig??? Or should i stick to the ol champs

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Old 01-25-2008, 12:10 PM   #2
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i use champion platinums.. not the double. however it came with ngk platinums.. i have an 05 and it has no wires.. and uses individual coils..

i dont know if i should have stuck with ngk's

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Old 01-25-2008, 12:43 PM   #3
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I have always used them because people said they were the best buts whats the difference in them i didnt think there would be
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Old 01-25-2008, 12:44 PM   #4
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X2 - Bosch Platinum (single). I run for 50K and then replace them. Never had any issues in any vehicle.
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Old 01-25-2008, 02:41 PM   #5
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I had the boch platinum 2 and they where burnt up with 30,000 on them they made my jeep miss and didn't feel like it had the same power as with the regular spark plugs.
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Old 01-25-2008, 04:37 PM   #6
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Screw the expensive plugs. Mopars run the best on good ol champion cheapos. I run the Champion copper truck plugs
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Old 01-25-2008, 04:55 PM   #7
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might want to look there... There is lots of instant info at your finger tips.
http://www.wranglerforum.com/search.php
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Old 01-25-2008, 05:03 PM   #8
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Quote:
Originally Posted by bpowa View Post
i use champion platinums.. not the double. however it came with ngk platinums.. i have an 05 and it has no wires.. and uses individual coils..
You should definitely be running double-tipped platinums in your distributorless '05 and not those single-tipped platinum plugs.

The new coil-on-plug design used on later distributorless 4.0L engines use doesn't do well unless both sides of the spark plug gap are identical. Jeep has issued a TSB (technical service bulletin) that upon receiving a Jeep with a bad idle or other hard to diagnose engine running problem, they are to check to make sure single-tipped platinum plugs are not installed and replace them if they are.

You should be running either non-platinum plugs or a double-tipped platinum plug like the Autolite APP985.
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Old 01-25-2008, 05:17 PM   #9
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are you sure about this.. do you have a link for the service bulliten?
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Old 01-25-2008, 05:19 PM   #10
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hhmmm after searching a bit i found some info from another forum...

Quote:
All the sales lit I've seen on these shows multiple sparks coming off the center electrode to the 2 or 4 or whatever grounds there are. This is simply not how they work in the real world. The spark jumps the gap that is the narrowest, and that is it. What happens is the plug will spark a few times on the narrowest gap, which widens this out a bit and when then change to the next narrowest gap and so on. So over time the spark will migrate around. But, it will NEVER all spark at once with all the gaps.
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Old 01-25-2008, 05:33 PM   #11
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are you sure about this..
No, I just pull the stuff I say out of where the sun doesn't shine.
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Old 01-25-2008, 05:35 PM   #12
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No, I just pull the stuff I say out of where the sun doesn't shine.
LOLMAO

That one made me LOL irl.

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Old 01-25-2008, 05:39 PM   #13
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I put the Bosch Plat. 2's on my '05 and I really can't tell the difference. My mpg has decreased and I still haven't received my rebate from Bosch.
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Old 01-25-2008, 06:03 PM   #14
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I wonder why bosch plats have such a thin electrode or whatever that is called.

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