Join Date: Jul 2006
Location: Baton Rouge, LA
I've got the same "engine miss" problem with my '97 TJ. It only seems to occur when I'm accelerating and I hit a bump in the road. If I lift my foot off the accelerator just before and during the bump, there isn't a problem. Its really strange. I had this problem last year, as well, and my mechanic found a hairline crack in the coil and he replaced it. This seemed to help for a few months, but the problem soon returned and has continued to get worse. Either the coil keeps cracking for some reason and needs to be replaced again, or the coil wasn't the problem at all.
Also, I was driving on the interstate and had been for about an hour when the engine started to miss for no reason and I was having trouble just barely maintaining 60 mph. I noticed that I was nearly out of fuel so I pulled over into a gas station, put in about 3/4 tank and got back on the road. The unprovoked engine misses went away and it just went back to missing when I hit bumps. So, I guess what I'm suggesting is that perhaps it has something to do with the fuel system. I really don't know though.
I wish I knew the answer because I'm having the same issue and need it fixed.