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  #106  
Old September 22nd, 2017, 22:33
Heavyopp Heavyopp is offline
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Re: Replacing the 00+ coil rail with aftermarket coils

Ok -- found this on another forum -- Does this look right?




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  #107  
Old September 23rd, 2017, 06:56
Talyn Talyn is offline
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Re: Replacing the 00+ coil rail with aftermarket coils

Yes, that is correct. Go off the green numbers.
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  #108  
Old December 3rd, 2017, 21:32
PhillyBrian PhillyBrian is offline
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Re: Replacing the 00+ coil rail with aftermarket coils

Getting a parts list together to do this swap on my 00 XJ, couple quick questions:

1. Will the Screamin' Demon coil (DUI-31729) for the 02 viper work? It has a 45k voltage.

2. What spark plugs are you using and with what size gap?
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  #109  
Old December 3rd, 2017, 22:05
Talyn Talyn is offline
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Re: Replacing the 00+ coil rail with aftermarket coils

The screamin demon coil will work. That was one of the upgrades I was going to do in the future, but haven't gotten around to it yet.

I'm running colder than stock NGK plugs. Can't recall the part number, but gapped to .040"
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  #110  
Old December 4th, 2017, 05:52
Redsnake Redsnake is offline
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Re: Replacing the 00+ coil rail with aftermarket coils

Good to know about the Screamin Demon coil... just for future reference if needed. I'd also think if you're going w/the higher output Coil then a 1 range colder plug would be feasible. I run the standard NGK plugs and I think they're gaped to the 0.035" NGK setting. The larger gap would likely work if you're upping the Coil. I've not done that on a Jeep 4.0 but it was common on sports cars and Mustangs I've had in the past to do that same thing.

Let us know how it goes.

Oh, and sorry about Photobucket killing all the pics... they can kiss my @ss if they think I'm paying them to host photos...
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