CEL Engine Misfire

[bmrboi2]

So Headed into the office this morning and was getting onto the expressway and the X5 Stumbles and Throws a CEL.....Engine is missing bigtime.....Awe Sh!t!

I pull over, turn off and restart. CEL gone engine running fine. I drive off gingerly and get a mile down the road, stumbling again, CEL and now at idle its missing heavily and idling around 500 RPM.

I restart and turn on the AC, the idle kicks up, CEL is off and all is seemingly well. 10 miles down the road, lots of shuddering in any gear at any throttle range.

I decide to turn around and head home. It is making pinging noises while in gear at idle and while in park the idle is fluctuating and there is a noticeable miss.

It seems like I got a crap batch of gas....that's what it feels like but im sure its some $700 part....Of course, my carly Bluetooth OBD thing is not here yet and its going into the Stealership on Tuesday. Ill Drop by a auto parts place and see what codes are thrown. Also Last night when I pulled in the car was running fine. No indication of an issue. I always fill up @ Costco and have never had issue.

I know any thoughts or advise would be like a shot in the dark but has anyone experienced this or something similar?

BTW I have Searched and I keep getting that error message.