I need help, I have a 2010 Clubman non turbo with 122k on it and auto trans. I recently replaced the vanos solenoid, one cam shaft position sensor ( I did not realize there are two at the time, valve cover gasket, plugs, and one coil pack that was bad. All of which helped my problem quite a bit. However I still am having problems accelerating, it will stall occasionally and after driving about 15-20 minutes it will "diesel" and then blow a cloud of white/blue smoke out of the exhaust. We have always run 93 in it since we purchased it (used) oil changes are done regularly. Original problems, sorry I don't remember the codes, dealt with multiple misfires, bad cam shaft sensor, and something else. When I had the valve cover off I inspected timing chain ect. all of which looked fine ie nothing broken or missing. I also have a very uneven idle at low RPMs. Any help would be appreciated. Thank you.

 

where are you located and can you post a picture. Please do scan the car and provide codes.