Hmm...OK, so where should I be looking to cure this? This is the first time I've had a MTX Duratec and had this symptom; my recollection of dealing with IAC failure on my ATX Duratec may be fuzzy.

Maybe I've got a vacuum leak in there somewhere...that's entirely possible.

"Think of it, if you like, as a librarian with a G-string under the tweed." Clarkson on the Mondeo.