3.7L V6 Misfire HELP! - JeepForum.com
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Unread 03-03-2013, 02:26 PM   #1
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2003 KJ Liberty 
Join Date: Mar 2013
Location: Port Deposit, MD
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   Reply With Quote Quick reply to this message
Unread 03-07-2013, 12:49 AM   #2
Registered User
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   Reply With Quote Quick reply to this message

3.7l , liberty , missfire , valve spring

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