Ok I've got a 2010 R55 rough idle hesitant from 1300-2500 rpm CEL P0300 P0302 P0303 and P2178 p2187. New plugs NGK Iridium. Oil change last week. The morning was the worst idle we've ever gotten from it. Sounds like a big cam. It was dark because it was 6 am so couldn't really look good. Few months back I got a 2196 and rotten egg smell just before that. I've served and searched and can't seem to find a thread paired with the misfires and too rich and lean codes. Granted I know a misfire will cause rich codes is it possible maf is messing everyone up? Car won't be back until later this afternoon just trying to get a head start. Any and all help is more than appreciated!!! Also noticed exhaust rattle when it was cold out right before 3000rpm

 

I don't remember the codes that flashed but symptoms are similar to my high pressure fuel pump misbehaving a couple of years ago. My garage suggested contacting the dealer and they tested it and performed a courtesy pump replacement. Zero dollars is the right price!

 

Free.9free sounds good to me! I've caught a little about the high pressure fuel pump and it just roll 66k so from what I've gathered that seems to be the culprit. It's def more of a fuel issue rather than ignition motor putters on cold start then pans out, low rpm loads it wants to fall on its face. Rather than lung forward, def a fuel issue.
Looking for a shop now, thank you!