unstable idlling-stalling im going nuts

[Ensoniq5]

If you'll pardon the expression, until you verify the operation of the closed throttle switch you are pissing in the wind by fiddling with the air screw, which will fix nothing. Its only purpose is to set up the initial position of the ISC. If your ECU doesn't know the engine's idling I'm not the least bit surprised that the idle speed would be significantly affected by temperature.

[GRH]

i had a go with it just now.. but i wasnt fully test it properly as the ****ing bottom screw snapped a piece and i couldnt open it, the gap next to the screw is too narrow to use a socket.. anyways
before tampering with it i tested it using the continuity method as described in the manual you linked, i noticed that it is ok usually but if i pull the throttle wire up and suddenly drop it sometimes continuity wasn't there, pull again drop again and works..
i was able to move it clockwise with a bit of force and continuity is stable. idling seems better now but need to observe and report long term result.
i also noticed if i tap on the sensor while continuity is on, it interrupts it. maybe sensor is dodgy.. maybe forcing it i buggered it who knows.

thank you for the great advice and follow up

[leadfoot6]

i had a go with it just now.. but i wasnt fully test it properly as the ****ing bottom screw snapped a piece and i couldnt open it, the gap next to the screw is too narrow to use a socket.. anyways
before tampering with it i tested it using the continuity method as described in the manual you linked, i noticed that it is ok usually but if i pull the throttle wire up and suddenly drop it sometimes continuity wasn't there, pull again drop again and works..
i was able to move it clockwise with a bit of force and continuity is stable. idling seems better now but need to observe and report long term result.
i also noticed if i tap on the sensor while continuity is on, it interrupts it. maybe sensor is dodgy.. maybe forcing it i buggered it who knows.

thank you for the great advice and follow up

A "thin wall" quarter inch drive 8mm socket will fit, whereas a regular half inch drive 8mm socket will not.