If I dont own a turbo buick is it possible to still get help in this regard? I read alot of the post in the emissions help section, but had my own questions. I noticed a few guys know ALOT about reading the printouts and was wondering if I could get some help in this regard. I am in Maryland and have a 1991 pontiac firebird 350 tpi. treadmill test failing HC and NoX, have some room in the Co department. after tweaking fuel injector constant, before that I failed all 3 test. If it is OK I will post up my reading and pictures of the read outs, if not I will just read up on some stuff since I wanted a TTA or at least do the engine swap into another thirdgen fbody.