TOPIC: IAC mod Theory

OK, I'm going to cross-link here to a post I made in another thread.

The post is my ideas and theory re: the Idle Air Control or IAC restriction mod.

Look in Category: Other Stuff.

thread is: Dan Merrick's Fuel Vaporiser and MPG recipe

post is: post # 22 page 2

This came up in the middle of yet another long wind discussion of things. So often nuggets of info get buried in a long thread. IF you are wanting to know more on the IAC Mod, this might help.








Tracy G

TracyG wrote: So often nuggets of info get buried in a long thread.

Agreed! Posts like this, pulling the wheat from the chaff, also help clarification for future readers, and boost search engine hits too.

Bump the post!

Tracy G

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?

Ken

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!

Tracy G.

Thank you Tracy, i will give the gasket a shot and see what happens.