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Old 06-28-2009, 06:56 PM   #1
finneys98xj
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Default I got a prob.

My jeep is being a BITCH! It back fires between 15-2000 RPMs and acts like it backfires and lose power for a moment. Things I know it aint are CPS, coil, Dizzy, plug wires, plugs, battery, and I'm getting good fuel pressure. I need help guys please!
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Old 06-28-2009, 07:12 PM   #2
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Might try some Marvel Mystery oil for sticky valves I use it in every thing that I have.
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Old 06-28-2009, 07:25 PM   #3
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Well before I read the second line I thought TPS then I noticed you havent replaced it. Go to a boneyard and grab every sensor you can, pocket them and start plugging. It is called long term lending and a hell of a lot cheaper.
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Old 06-29-2009, 06:25 PM   #4
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TPS didnt fix it either,.
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Old 06-30-2009, 12:36 AM   #5
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you pull codes?
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Old 06-30-2009, 06:29 AM   #6
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Quote:
Originally Posted by Veeb0rg View Post
you pull codes?
aint giving any
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Old 06-30-2009, 04:55 PM   #7
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Here is a long shot but it makes sense. BAD GAS , it wouldnt throw a code for bad gas and it can definately cause running issues. Add some more gas in the tank and hold it at 15- 2000 rpms a while and see if it gets better.
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Old 07-02-2009, 08:48 PM   #8
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Bad MAP sensor will cause this......
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Old 07-03-2009, 07:56 AM   #9
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Well i unpluged half of my harness and pluged it back in and it cleared up all except it misses every once in awhile while driving.
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Old 07-03-2009, 08:01 AM   #10
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Are your connections corroded?
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Old 07-03-2009, 01:04 PM   #11
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no but the plug right behind the vavle cover if i unplug it and replug it will run right for awhile what does that plug go to?
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Old 07-03-2009, 01:39 PM   #12
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Sounds like the plug in for the cps
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Old 07-03-2009, 08:59 PM   #13
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Quote:
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Sounds like the plug in for the cps
It aint i know which that is I just replaced it.
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Old 07-04-2009, 04:09 PM   #14
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Just trace it and see.
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Old 07-04-2009, 09:16 PM   #15
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Quote:
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Just trace it and see.
I aint had the time but I know it runs under the heep.
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