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Old 03-08-2013, 08:37 PM   #1
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01 jeep wrangler sahara 4.0 random multiple misfire

hey guys so iv been having an issue with a random multiple misfire on my tj it started right after i got rear ended he crunched the fuel tank up pretty bad so i had to put a new tank/fuel pump in and maybe a week after that i got a random multiple miss fire code so i replaced all the plugs. then a week or so later the check engine light started flashing randomly for varying amounts of time then it will stop flashing(check engine lights stays on) but i feel no loss of power no rough idle nothing that feels like a misfire im pretty much stumped its got 120k miles. any help would be appreciated

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Old 03-08-2013, 09:41 PM   #2
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Ive had this happen 2 times. Went away the first time with me doing nothing but came back a few weeks later. Changed the plugs and it hasn't done it since. Idk. But my code is random cylinder misfire. Its crazy how it comes and goes.

Hopefully someone can give you a straightforward answer cause id like to know also.

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Old 03-08-2013, 10:44 PM   #3
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Mine did that when I first bought it last year. I replaced the crankshaft position sensor & it still kept throwing the code for a misfire on cylynder #2. I changed the coil pack & haven't had the check engine light come back on since.
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Old 03-08-2013, 10:54 PM   #4
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It seems odd it would happen right after you got hit. Did you ever replace the fuel filter? Maybe the jarring clogged it up. I would set up an inline pressure gauge to ensure you're pump is putting out consistent and proper pressure. It seems unlikely that it has nothing to do with the rear impact - though I suppose it could be a huge coincidence.

Random misfires are the worst.
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Old 03-08-2013, 11:07 PM   #5
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i dont think that it had anything to do with the rear ending but i just really have no clue iv heard so many things that could be the problem but all of those would be jeeps with higher miles such as excess carbon build up but i run seafoam in it every couple of months to keep it fresh also a plugged up cat but this jeep has never really done alot of in town driving its mostly highway miles
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Old 03-09-2013, 06:51 PM   #6
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And is it worth bringing it to a dealer to look at it?
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Old 03-11-2013, 07:45 PM   #7
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So I just pulled the codes again and so far I have misfires on cylinders 1,4,5,6 which makes no sense to me

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