Above is not needed. Is part of directions how to set the Idle Stop screw on TB/TBI itself. See my Cave,
Idle StopYou only adjust the screw for replacement units or damage/maladjusted screws. Screw might move/wear over decades but Many morons think can adjust that screw but only make more problems that ECM and IAC may try to "fix" or not.
IAC will "reset" "relearn" itself ever time the car is driven over ~ 35mph in all Fiero and others w/ old GM OBD1 ECMs.
Note that you will often get high idle first after replacing or often cleaning IAC because you often mess w/ the motor to install/clean it.
The motor and valve must be "force" to retract when installed or can easy damage the IAC and TB/TBI seat the valve hits.
Most new ones have directions to retract out of the car. If not find same in most books and many web sites.
"Force" does not = much Force by you but directions to retract change a bit for different IAC types and should tell how to ID the type for directions at hand.
Take more effort then doing it wrong or IAC is binding for whatever etc.
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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)
The Ogre's Fiero Cave