engine rpm surge. help needed.

[fixkick]

I might add, I see no future for IACs now.
it's too old now.
every thermal cycle is stress on it, aging effects.
I know one guy , remove it, and modified it to just and air hose.
then added air valve to the dash and used a knob on it to set idle cold air.
crude, yes, but is no more complex than an old carb choke. manual.

or add and 12vdc VSV valve to that added air port
then have hand made and tuned, up. air orifice there. (a plastic pipe, hand drilled as you want it.)
and a switch marked, hot /cold start.
set it to 1500 rpm cold, or as you like.