I've posted on here a few times about how I have had a rough idle and I see that some of you have the same issue. My next question is this, has anyone had any issues where the car actually backfired? I have this issue on occasion(usually shortly after startup, when I'm accelerating and then let off to shift). It is definitely a backfire, and is not just the burble of the exhaust, or the pop on the overrun. I actually hear a loud explosion. I'm guessing that the car is running rich? Could this be part of the rough idle issue? Still no CEL. If I take it to the dealer and they don't see any trouble codes, and I'm not able to duplicate the backfire, I'm sure I'm going to hear the same thing I heard when I brought it in for the rough idle(which was pretty much nothing). I have no mods to date, and have the side pipe plate restrictors removed. Any suggestions before I(great) go back to the dealer?