Hi guys, own a 56 1 series 120d with 72 on the clock. Had her tuned for performance and mpg. Currently for 202 bhp and 284lb/ft. Since the tune I noticed she smokes more, under a little acceleration I see faint dusty smoke n harsh acceleration thick black smoke.... Once booted a few times she smoke will fade but will come back after normal driving. Any thoughts or is this the norm with a tuned diesel? Cheers guys