misfire cylinder 5 - JeepForum.com

 
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post #1 of 10 Old 05-08-2014, 01:26 PM Thread Starter
Shevin92
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misfire cylinder 5

i have had a cylinder 5 misfire code the last 3 times my cel has come on. we have replaced all the spark plugs, swapped cylinder 5 for 3, and also changed the fuel injector on 5. Now my cel is on again and the code reader says random misfire on cyl 5.... Idles rough not all the time, but more often than not. Runs good. Have had a ton of electrical issues with this jeep in the past 2 years so not sure if that's part of it? HELP! 2008 jeep liberty.

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post #2 of 10 Old 05-08-2014, 01:47 PM
lfhoward
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Sounds like you have done well to eliminate the plugs and fuel injectors as the culprit. If you haven't already done so, swap the ignition coil on #5 to a different cylinder and see if the misfire follows it. If so, you have a winner. If not, I think it may be time to bring it to a mechanic for a pressure test in that cylinder or an electrical diagnosis. How many miles do you have on it?

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post #3 of 10 Old 05-08-2014, 02:02 PM Thread Starter
Shevin92
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It has 53,000 on it. We did initially swap 5 for 3, and no problems coming from 3 so far. I hate to keep putting off bringing to a mechanic if it could be something serious.
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post #4 of 10 Old 09-26-2014, 03:14 PM
agk2008
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did you ever figure out the problem. I have the exact same issue and we have done all the steps you have done. I just want some answers.
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post #5 of 10 Old 09-26-2014, 04:13 PM
lfhoward
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If you've eliminated plugs, ignition coils, and injectors from the equation, I think the next step is to have your mechanic do a pressure test on that cylinder. If it won't hold pressure you may have a head gasket issue or something else. Sorry to suggest that, but it looks like you've taken care of the easy stuff.

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post #6 of 10 Old 09-27-2014, 10:36 AM Thread Starter
Shevin92
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Yes. It was a blown head gasket. I had to have both heads rebuilt. About $2900. Good luck!
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post #7 of 10 Old 09-28-2014, 06:45 AM
Gageraid
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post #8 of 10 Old 09-28-2014, 01:12 PM
DarkSport11
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Quote:
Originally Posted by Shevin92 View Post
Yes. It was a blown head gasket. I had to have both heads rebuilt. About $2900. Good luck!
53,000 miles and a blown head gasket, both heads needed to be re-built? That certainly sucks, sorry to hear the outcome to your problem. 2008 or not at 53,000 miles Chrysler should eat that one I don't care why they say, total BS IMO.

2011 KK Sport 4X4 in Dark Charcoal Pearlcoat
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post #9 of 10 Old 09-29-2014, 09:54 AM Thread Starter
Shevin92
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Oh believe me I called Chrysler! They said if I had been the 1st or 2nd owner (even though my warranty was expired), they would have been able to help me but since I'm the third owner they don't know how the jeep was maintained prior to me blah blah blah......... I was pissed. It's funny that my local jeep dealer is actually the ones who told me to call and complain to Chrysler. Every complaint helps make a claim for a recall. I hope more people call them and log their complaints!!

My brother is a mechanic (in fact his machine shop did my heads) and he says they see so may issues on this engine (3.7l) that they are surprised there has not been a recall yet. I guess it happens all the time.
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post #10 of 10 Old 09-29-2014, 08:17 PM
Dave_B
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You sure don't see a lot of engine failures on this forum. The 3.7 has been around a long time. Sounds like your truck may have been abused by a previous owner.
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