I was wondering if anyone has had this situation before and could provide some feedback. I started having this issue recently and I'm not sure the direction to go in. If the vehicle has been sitting for a while, it starts up and runs perfectly. However, if I drive it somewhere, even 10-15 mins away to the store or something, when I come back, it idles really rough. 9 times out of 10, I don't get the check engine light and it eventually will run fine after driving for a few mins or less. However, when I did get the code, it was a cylinder misfire (cylinder 4 I believe). Also, I don't drive the Jeep all the time, it's more of a pleasure vehicle on nice days. Not sure if that would affect it, but just giving the info. I changed the plugs when it first happened, but didn't resolve it. Any help would be appreciated. Thanks!