No codes at all on the cluster. I read somewhere that it could be because of a crack in the rubber boot between the throttle body and intake. Not sure if that's it though because it will run fine one day and terrible the nextI recently got an 09 550 and it will run fine for a min and then when you try to push the has it just Boggs down and won't go. Has a new battery and freshly oiled the filter. It's getting fuel and spark. Any ideas?