IAC bad or?

[GAMEOVER]

How can I tell if IAC is any good? At start-up the IAC steps are 260 but motor wants to die... 5 secs later motor recovers but IAC steps are still 260, it's funny because I can actually hear the air rushing into throttle body as the IAC is opening but IAC steps don't change on data log.... While data logging around the neighborhood I see that the IAC steps shoot up to 310 and then drop to 176 and finally go as low as 157... Motor was adapted into a 1972 Chevy Blazer: Stock 2005 6.0ltr running OLSD converted from Drive-by-wire to Cable throttle body.

Log included

[mr.prick]

Mine starts high at cold start and goes to 60-80 steps when warm.
Log RAFIG and see where that is at.

[Doc]

Not to be capt. obvious but, have you tried opening the TB Blade a bit more, followed by a TPS reset? Only try this on a fully warmed up motor.

Or are you just not sure it is functioning at all?

[GAMEOVER]

I've tried opening/closing the blade, idle timing e.t.c. I'll log RAFIG later on today and see what that shows...I think it might not be functioning at all.

[mr.prick]

Can you hear it move to the default park position when the engine is turned off?
IAC steps change in the log, maybe the worm gear inside is gummed up.