im currently running a q45 afm with a power fc pro and the car wont idle or run properly at all, ive also tried a z32 and i get the same problem, but when i install the standard gtir afm it runs sweet?? my conclusion is that if u look at a standard afm the element is sheilded from airfolw so to speak its designed to let air pass through it but not back up it as the element or hotwires if u like are protected in another channel. im thinking that the turbo is pushing air back up the inlet pipe to the afm and causing them to go mental, so i think the problem is with the design of the q45 and 300zx afms anyone come accross this problem before or even better know a way round it? thanks.