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Old 11-01-2010, 09:41 PM
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MaxPower1971 MaxPower1971 is offline
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Join Date: Nov 2010
Location: Laval, Quebec, Canada
Age: 43
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Vehicle: 1993 250--1994 2500--2005 2500
Engine: 1994-1997 360ci (5.9L) Magnum V8 230hp
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First off, WTF the mechanic was doing driving your truck off-duty??? F****N A****LE!! That would piss me off too!! And you can be sure they would fill her up real quick......

My .02 is that your cat is plugging, or o2 sensors going out (most likely pre-cat), but it would'nt be going away at higher speeds.
Did you get a CEL when it was running?? If so what fault code did you get? I don't know where you are, but some auto parts stores will lend you a code reader for free.

Other causes for this would be:
Bad injector
Failing coil
Failing Camshaft position sensor (pick up coil)

But considering it backfires out the TB, I would say it's not exhausting properly.

I run Champion plugs on my truck. Stay away from Accel and the likes. Dodges also don't appreciate aftermarket sensors much....
Can't remember the gap tho....
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Last edited by MaxPower1971; 11-01-2010 at 09:44 PM.
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