Okay so I've been having quite a few problems with my Z these last few months and its really pissing me off. I've replaced the AFM twice and I'll be going to my 3rd one here soon. The AFM went bad in June and I bought a remanufactured one from O'Reilly which went bad in about a month. I returned that AFM and bought another remanufactured one from Advance Auto Parts which just went bad today. I can't rev past 2,000 rpm so I know its bad again. Could something be causing the AFM's to go bad, or is it possible that I've just bought two shitty ones?