Should've given up a long time ago and taken the car to a competent place, but too stupid to do that... so, if one of y'all can start up your miotter, unplug the IACV, and report back, that'd be great (don't forget to clear your code!).
It used to die if I did that, playing around today, it kept idling.
There's a manual throttle stop adjustment, it's the screw-head looking thing on the throttle body. If you advance it far enough, then the car will idle even without the IACV plugged in. Typically, that's not the correct adjustment for use with the stock ECU.
My NA8 will idle with the IACV unplugged unless you put an additional load on it (air conditioning). That will kill it.
that is the purpose of the IAC, to pick up the load/ keep it from stalling.
It used to die at idle when I unplugged it, now it doesn't (i.e. now it will idle when unplugged).
So if it should idle when unplugged, that's the answer to my question.
No luck with the cam sensor fix then?
I replaced the sensor itself, that wasn't the issue (but I kept the spare anyway).
There was the sensor plug issue someone mentioned, but I didn't properly follow up on that (In fact, I'll go re-read that now, that would be a cheap easy "fix" even if it's not the issue...).
That and I need to find the test values/procedures for the IACV.
If it used to die when unplugged and now doesn't, and the idle hasn't changed in any other way (ie, there's no vacuum leak resulting in a 1400 RPM idle), then I suspect someone has messed with the adjustor.
Any false air ?
In reply to codrus:
No, idle sits fine.
I'm 75% certain I have a suspect ECU, but I really need to test the last couple items.
IACV ties straight to ECU, not connected to any other components wiring wise, so if it's not another faulty IACV (possible, but in all my research, I don't think I've seen many posts indicating it's a common failure item like cam sensors or coil packs), or the cam sensor plug, it's ecu.
Fact that it throws no codes when dying (though it will if I unplug it to test) points me in that direction.
In reply to iceracer:
All that stuff squared up in the process here...
My 96 Impala SS dies. But its a spring/solenoid, so when you take the plug off it closes.
02 F150 stays running the same because its a servo, so when you unplug it, it stays in the same position.
Does the NB have a servo or solenoid?
Didn't just do it, but have done it in the past. I can't seem to find the IAC on my 67 LeMans 
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