Last week I installed a MAC 70mm TB. I know I know...almost everyone thinks they are junk, but its on now. So today I install a C&L 80mm MAF and True Flow inlet pipe. Now the electronics were already in the MAF, the setup came off of a running 96 GT. I replaced the 24lb sampling tube with a 19lb sampling tube because I have stock injectors. It looked as though the 19lb tube was larger than the 24, and that may be right. Anyway...now Im running lean, like pretty bad lean. I have detonation early in the upper RPM range. I am also running a crappy Superchip with a mail order tune for a stock 97, yes I bought it in a moment of retardation. Any ideas? Will the cars ECU adjust for the new MAF? Should it have done this? I am going to put my electronics in tomorrow just in case.