Looking for information on a 4.6 liter 2 valve ford engine. Is this IAC mod the same as the chevy tbi's? Are we just taking a 1/2" hole and trying to remake a metal gasket to reduce this down to an 1/8" hole?
Hi Ken, the Chevy TBI and the Ford 4.6L are very different. I personally have never had, or heard of, good results from trying to restrict these Ford IAC valves. Ron, years ago spoke of making the metal plate out of a thin piece of aluminum sheet, and drilling a 1/8" hole in it to restrict the IAC airflow. I've just left the Ford IAC's alone.
I usually use epoxy techniques to restrict IAC flow on TB's where the IAC is integral on the TB. Where there is a passageway or port the IAC air goes through, like many older Gm TB's, and some Asian import ones
good to hear from ya, Ken!
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Gadgetman Reno, NV