not true. it's not the IAC's fault it gets gummed-up, but the fact that most people dont change the PCV valve, or when they do they also buy aftermarket ones which will draw to-much thru the crankcase and gum-up the intake and IAC. again, do NOT buy aftermarket IAC's, TPS, PCV's, O2's, IAT's, ECT's and so on from the aftermarket. they are not made to FoMoCo's specs and will cause you problems, if your Ford dealer wants to much for a part, just give me a call and I'll try and help you wth pricing.