Okay, so recently I've noticed something weird. I was idling at Dairy Queen last night, for maybe 5 minutes and all the sudden the rpms dropped down to 400-500. So, I give it a little gas, I hear a popping sound, it hesitates a little, revs up like its suppose to then its fine. O.o This is the 2nd time this week its happened. I'm not to mechanically savvy when it comes to cars (atleast not yet) since I'm only 18. Other than this happening, the Jeeps running fine. No other weird anomalies or noises etc. Anyone have an idea whats wrong?