e46 smoking at start-up

hello fellow e46 owners, this is yellowboy....my problem is my bimmer is starting to smoke at start-up with a little rough idling and alot of trouble codes. I have performed a radiator combustion check to see if there was some combustion in my antifreeze...."it was not", checked for suction from the oil filler,"It was suction there"...do any body know what is going on???......THX