I need help.. I replaced my battery the other day and prior to that had the guys at Advance Auto run a code check. Came up with two codes P0301 and P0351. So an ignition coil pack circuit malfunction and cylinder 1 misfire. Talked to the tech and we decided it was probably a bad coil pack, bought a new coil pack and went ahead replaced the spark plugs while I was at it, they were due and just in case they were causing the issue. When I pulled the old coil pack of cylinder 1 it was cracked and had melted a little at the top part of the housing. Thought this was definitely the issue, but after I installed the new coil pack, turned on the engine let it run for 5 minutes and the new coil pack completed melted as well. None of the other coil packs are getting hot, only cylinder 1. I've checked for wire damage and don't see any.. Has anyone seen this or dealt with this before? I need help..

 

Well, a continuously grounded coil could melt with power supplied for any length of time.

First off, I would check battery voltage.
Then check voltage on the contact 1 relatively to the ground, looking for 0.

Check the voltage on the contact 2 relatively to the contact 1. Must be close to 0 as well or below 0.3V. If you see any voltage above this on this contact do not connect your new coil, it will be melted as well.

 

Thanks for the quick response, will check that first thing in the morning. How would I fix this issue if the coil is continuously grounded?

 

Here is an electrical trouble shooting guide and I would get a good multi-meter. Here you go.

http://books.google.com/books?id=9TA...age&q=&f=false

I would inspect your engine wiring harness. Check all of the wires to ensure none of them are bent or cut. Two wires exposed or cut making contact will do it also. If the power source for the coil and the ground come together that will cause the problem.