my car is a 93 tt with only 45k on it and i get a 2 second puff of smoke at idle during redlights more and more often now. i assume its the valve stems seals since it did it during stock twins and now single turbo. i also get smoke[white] on boost but just a tiny hint of it while at wot[people behind me tell me this]. i did a compression test and that was a result. i just wanna narrow this down to the stem seals before i buy them from the dealer and pay big bucks to get this job done right.