I just bought a 2003 Jeep Wrangler with 30000 miles on it. On the way home from the dealer, it started misfiring. They took it back and are looking for the problem. They are being honorable dealing with this and offered to return my money. I want the Jeep. It is extremely clean for a 2003. So far they have replaced the computer, replaced the injectors, done a valve job. The computer analyzer shows that one cylinder is not firing right but no other problem. Any ideas that might help solve this problem? Thanks

Okay fine here is what they have missed.Did they scope the coil. Did they identify a coil limiter as it ramp on the scope. They need to do that ,why simple coil are heavy amps it takes out ECM when they didnt find it. Valve job is not the problem why they did that I dont know (warranty money I think). Heres how you help them what cylinder did the misfire occur at. lets say 3 . Now ask is it a lean misfire if it is. repair the vacuum leak at the Map sensor that will cause a misfire. That is if it is 4.0 engine or 2.0. What gets me is do they use the first pulse sensor and are they capable of using diagnostic equiptment. come on 2003 Ask them is it a lean misfire and what are the kv and let me know me and you will fix it that is if you want it. Give me the data stream warranty pays what do they got to hide