had nothing better to do today I just put it on. The engine rev's up a bit easier. From what I understand the engine idles with the throttle closed rite?

The Idle Control Valve (aka ICV or ISV) allows air to enter the intake manifold to regulate the idle.

took me awhile to figure it out.

Since the ISV has no inlet ports outside of the intake manifold yet has 2 ports in the ISV body leading into the IM and both butterflies are completely closed, where exactly does the ISV get the air required to idle the car?

I'll allow 24 hours for anyone to come up with the correct answer.

that T's off to purge cannister on one side and primary inlet venturi on other side. Just complete the thought or sentence and you're home free.

It'll also point out why I reduce the bore diameter leading into the primary venturi. There is a very good reason beyond practicing my epoxy puttying and drilling under-size technique ;-)

really explained how it works yet. And no air dumps into the primary venturi from that hole... none whatsoever.

Explain the route air takes to sustain idle with both butterflies closed.

Of the two ISV "holes" visable on the outside of the IM one runs to the passage in the TB and the other runs into the IM. The ISV is a valve that opens and closes this passage at idle.

Air path: Primary TB Venturi "hole" -> IM passage -> ISV -> Another IM passage -> Inside IM

Maybe I should draw it? ;-)

in a little greater depth so that the average owner/layman here understands the dynamic beyond an over-simplified "two tubes connected by a valve" definition. Where air comes from when butterflies are closed, the path it takes and what happens to it along the way and where it goes when it's finished doing it's job. That they might be able to understand the dynamic at play here and what an ISV is doing besides opening/closing and the mechanics of why an engine stalls or stutters when an ISV is failing rather than just becuse the ISV is bad, failing or has it's ohms out of spec/range. And why a metered orifice wouldn't work just as well.

Ya know... an explanation on how stuff works as it relates to the topic. Not for you or many others here. But for some who would appreciate being brought up to speed on "exactly" whats at play with the entire butterflies-closed-at-idle/ISV relationship dynamic.

No, not draw "me" a picture but maybe explain it a little more clearly for some... maybe even draw them a picture.

idle? I'm guessing when I'm driving there might be cooler air getting into the air intake, rite?

sit for a long time at idel.