I recently replaced both the IAC & tube with Fords "new & improved" pieces. Guess what? It still mooses and I also have the TH fix. Funny thing though, I've owned my car since day 1 and it never "moosed" before. Mechanical or other wear issues can cause it.
There's a much bigger issue here, as in poorly designed (from a resonance viewpoint) inlet system. Do a search, you'll find plenty of info.
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