Who was it.. Changed their IAC.. different style.. independent vacuum?

[NERD]

Who was it that Changed there IAC for a different style? It was from an Exploder or 4v and it didn't need the vacuum tube??? How did it go and did it work well?

After going over all the voltage ranges of the different model IAC's it seems I can tune them all the same so I'm may be switching to clean up the engine bay even more.

Thanks...

(I think the person had a RED Plenum and intake.)

 

[joekd]

It was me and you are right, it was an Explorer IAC

I never really got it to work the way I wanted so instead I ended up just replacing the factory air feed with straight 1/2 hose to eliminate the plastic box look and clean up the engine bay a little

Here's how it was

Here's how it looks now (yes I know there were other changes made also between the tow pics but this is all I could find right now)

As you can see the vacuum line is all but invisible and your eye is drawn to the upper plenum instead of the ugly box

 

[NERD]

What was your issue with it? What was it's idle handling characteristic? Depending on what they were I can tune it out.

 

[joekd]

It wasn't a signal/tune problem at all, the problem is that our upper plenum has no "feed" for air to get in (is designed to work off the front air feed while other IAC setups like the ranger and explorer have two open ports)

I tried to slot the IAC to allow an air feed but it simply wasnt enough.

 

[NERD]

You tried to slot the IAC or the Plenum? Is the external Air cap the issue?

 

[joekd]

The plenum on the mustang has no air feed at all (behind the left port is a sealed area)

This is an aftermarket piece but it helps illustrate my point, left side sealed, right side feed air into plenum to maintain idle.

I tried slotting the IAC thinking the cap wasnt allowing enough but it turns out the air cap feeds none at all, it seals up tight since the other applications have an air feed for the left side port.

 

[NERD]

Why didn't you drill through the plenum on that left side?

 

[joekd]

My logic is that I would rather use the air line in the front before I drilled through the plenum itself

Plus that wouldn't really be a bypass since it is after the TB butterfly anyway. All you would be doing is sucking air out of the plenum

 

[vermilion]

i dont think thats possible.

 

[joekd]

i dont think thats possible.

Umm..ok. You dont think what is possible, me trying the Explorer IAC (which I did) or the drilling part I mentioned and said it wasnt a good idea?

 

[NERD]

I don't see why it wouldn't work? Being that the expoder is a 4.6 it should work if it's drilled out and tuned to meter correctly.


Does anyone have a picture of the 4v IAC that's remote mounted?

 

[joekd]

The IAC without the hose gets air from the throttle body before the TB blade. Cars with those types of IACs have a small hole directly before the blade of the TB, the hole is on the throttle body itself. Then on the back of the TB there is a small slot which goes into the intake manifold directing it into the IAC valve. The 2nd port of the IAC gets air directly after the TB from a hole in the manifold.

Here is the explorer and ranger 4.0L setup, you could make it work like this but honestly I don't feel it would be worth the effort.