Already did...

 

I already told you what to do to probably fix your problem. The link for the part is possibly all you need to fix your mis-fire problem. The Jeep dealerships themselves put out a TSB to fix it the same way. I wouldn't wrap anything else because that'll probably give you more problems. I had the same issue like I said and the $7 wrap on the injector made it to where it never did it again.

 

3rd cylider injector is shot. Just got another code pulled from advance auto... Yippee..

 

What codes now?
Go check to see what head your running. I can almost guarantee it's an 0331 which are prone to overheating and then cracking. There's a wall defect between the cylinders. To check, grab a bristle brush and some brake cleaner and look/clean between cyl. 3 and 4 just a little under the valve cover lip on block. It's hard to see, but it's worth knowing. There will either be 0631 or 0331 stamped there. The 0631's are good to go, the 0331's are subject to issues if they overheat. Not that you've got a cracked head, or something terrifying, but it can be good info to know.

 

Changed injector this mornin... got it hot in this nice breezy sunny 90 degree northeastern Ohio weather and.... No check engine light.