I suspect my problem is similar to what David Vachon is asking about, but don't want to hijack his thread with my questions. ;-) About two weeks ago my 2011 Liberty started getting that slight hesitation that only a daily driver would notice, and it's become a misfire on #4 (P0304). I was going to swap coils around this weekend but it got much worse this morning (now P0304 and P2302), so I stopped at NAPA and picked up a new coil for 3 & 4 (the center one). This has had no effect whatsoever, but having a spare coil will be nice. All plugs and coils were replaced a little over a year ago, for what that's worth. I'll try replacing the the front coil now in case I've misinterpreted the order, but any thoughts would be appreciated. Thanks!