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Champion Truck Plugs

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Old Nov 14, 2008 | 03:24 PM
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From: N.J. Shore Area
Year: 1994
Model: Cherokee
Engine: l6 HO
Default Champion Truck Plugs
Does anyone know the number plug for the 4.0 HO motor because AZ here doesn't seem to know. Thanks...Tj
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Old Nov 14, 2008 | 03:38 PM
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From: In yourz postez fissin jurr spelinzs
Year: 1990XJ/1989MJ
Model: Comanche
Engine: 4.0L Renix
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RCY9C is what is called for on my Renix. IDK if it changed with newer Jeeps.
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Old Nov 14, 2008 | 03:38 PM
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part number should be CPN-4412 or just 4412 and they should be about $3 or less a plug.
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Old Nov 14, 2008 | 03:48 PM
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Thanks guys...Tj
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Old Nov 14, 2008 | 04:27 PM
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Also I don't think Autozone carries the truck plug, so you might have to goto a different parts house..
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Old Nov 14, 2008 | 05:31 PM
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4412 is correct. FYI: the only difference between the Truck Plug and the std. Champions is the size of the electrode. The Truck Plug has a fatter electrode. That's it.
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Old Nov 14, 2008 | 06:27 PM
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Once again thanks for all the help you guys give...Tj
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Old Aug 15, 2011 | 07:47 PM
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I've used Champion 4412's and was recently told that the 7034 replaced the 4412. It is a platinum plug and also was told they don't run well in the 4.0l IL6 with the rail coils/ignition. I've also used NGK ZFRSN at .035 and they run well.

Anyone with experience in the plug thing? I don't want to put in 7034s.
Last edited by shinyredcsport; Aug 15, 2011 at 07:48 PM. Reason: spelling error
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Old Aug 15, 2011 | 08:51 PM
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Originally Posted by shinyredcsport
I've used Champion 4412's and was recently told that the 7034 replaced the 4412. It is a platinum plug and also was told they don't run well in the 4.0l IL6 with the rail coils/ignition. I've also used NGK ZFRSN at .035 and they run well.

Anyone with experience in the plug thing? I don't want to put in 7034s.
I've always been an NGK fan. Run them in my three 4.0s.
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Old Aug 15, 2011 | 09:41 PM
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Champion TRUCK plug number for any year 4.0 is 4322.
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Old Aug 15, 2011 | 09:47 PM
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Originally Posted by cruiser54
I've always been an NGK fan. Run them in my three 4.0s.
This.

NGK for the win. Wouldn't trust anything else. Especially if it happens to say "champion" on the side...
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Old Aug 15, 2011 | 09:47 PM
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Originally Posted by 84zmyfavorite
Champion TRUCK plug number for any year 4.0 is 4322.
Incorrect. 4412.
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Old Aug 15, 2011 | 09:53 PM
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Originally Posted by Techprimus
This.

NGK for the win. Wouldn't trust anything else. Especially if it happens to say "champion" on the side...
x3 I only run NGK in any car I own
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