3.7L V6 Misfire HELP! - JeepForum.com
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post #1 of 2 Old 03-03-2013, 01:26 PM Thread Starter
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2003 KJ Liberty 
Join Date: Mar 2013
Location: Port Deposit
Posts: 1
3.7L V6 Misfire HELP!

I have a 03 Liberty V6 3.7L and When I got it it had a Misfire on Cylinder 4.I just thought it needed a spark plug change no big deal it ran great.I changed all spark plugs and the Check Engine light went off and it ran like a dream.About a day and half later the light came back on.It now had a shake to it so I went out and got a replacement coil and put it in did not go away and the Light started blinking.Went to go put it into a garage to work on it with a friend and smelt something burning looked under the hood and the coil pack was melted in half I figured it might have been a faulty coil pack so I put the old one back in to get to the house and by the time I got there it had already started melting this coil pack.I checked the spark plug to see if it was fouled and it looks like it did when i put it in.I do not know what to do at this point as I dont have the money to put it in a shop and dont know alot about engine work has anyone else had this problem?Ive read alot about these engines breaking valve springs?

Chris011887 is offline  
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post #2 of 2 Old 03-06-2013, 11:49 PM
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2002 KJ Liberty 
Join Date: May 2010
Location: IN
Posts: 75
Check the spark gap on that plug, after that look for a short in the wiring or a bad ground. You can also check the resistance of the coil packs and see if its uniform. I wish I could be of more assistance.
Durango_USMC is offline  

3.7l , liberty , missfire , valve spring

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