Ello! I'm new to this forum and I bought my very first Jeep back in October of last year. I have the 2011 Compass. I'm having a weird hesitation in acceleration and I took it to the dealer and they claim that they don't know what I'm talking about. Sometimes the engine rumbles at idle, and some times when I press on the accelerator, rather gently because I like to conserve gas, it rumbles and hesitates. Anyone know what this problem is or what I can do to rectify it? Any info is much appreciated. I've only taken it to the dealer for oil changes and things of that sort. The only thing I did myself was install a K&N air filter, because I heard it helps with gas. Thanks for any input!