Possible Idle Control Adjustment repair related

[CamelotShadow]

When I picked up my 82/83 euro 500 sec from the shop
I asked if they had noticed the ICV was an airslide not electroniic
They said they had noticed.
So I asked if it would be any problem
& they said it would not be.

I mentioned being concerned as the car in drive was spec 650 rpm but I thought the AC could lower the rpm with possible problems.

My mechanic told me to turn something to increase idle if it was too low.
I thought he meant the air slide valve but now I think it looks like
it could be the yellow valve with a screwdriver indentation on top?

I finally tried the Ac while driving & the 600 rpm drops to almost 500

I should call the mechanic
but obviously he thought me capablr of doing it
& I thought I knew what part he was referring to but now I;m not sure.

Would turning the circled valved increase/decrease idle?

I will have to check but since I got the car back the car is idling lower
sometimes close to 500 esp w AC

It used to idle fine in drive but after the new plugs, wires, thermal vacumn valve switch & acumulator
& possible adjustment of this circled valve
I;ll have to check its curreent position against the pics of the prior valve position & get it back to where it was.

He seemed to know that the idle of a car w a airslide valve was supposed to be higher in park at startup & he didn't mention adjusting the idle down so not sure how the work done lowered the idle.

Would I have to turn it counter clockwise to increaase rpm?
It looks like it was more 10 oclock ish & now its like 11 ish?

Thanks

I'll probably take it back when I get a chance to get it straight but in meantime I would like to know what to do if I run into a probllem...

Thanks