unstable idlling-stalling im going nuts

[Ensoniq5]

Resetting the idle speed by fiddling with the air screw won't fix any idle problems in the long term, it will only mask them for a while until the ISC resets its position. Similarly, disconnecting the battery will reset the ISC and the engine may idle fast-ish for a while but within a few days it will move back to where it was. You need to diagnose and fix the underlying condition. The first thing I'd be checking is the TPS to make sure it is consistently switching the ECU to idle mode with a closed throttle. If not, it may be out of adjustment or there's something dodgy with the throttle valve, shaft or cable preventing it from closing fully with your foot off the throttle.

[GRH]

one other thing to mention.
i remember hearing that if the air screw is fully tightened with throttle adjust screw fully loosened the engine should stall??
doing this on my car doesn't stall the engine.. air screw fully closed engine still idles around 500-600 rpm.
not sure if it means anything