Auxiliary Air Valve question Options

[torakki]

This is on a '74 2.0. This car's been on and off the back burner for a number of years. (To many cars). It now runs very well, "Except", when it's cold, it idles perfect. As it warms, (about 2 minutes) the idle gets faster to about 1800 rpm. After a 15-to-20-minute drive, I shut it off. Restart a few minutes later and the idle is slow to wont idle fast enough to keep running. So, I'm checking the Auxiliary air valve (I took it apart) and when it's cold, it's open halfway. When it gets warm, it closes. Shouldn't it be opening when warm to let in more air to keep the idle speed up? In other words, lean out the mixture? I would think, when cold, it should be closed to richen up the fuel and warm, open to lean out.
Am I 180 degrees off?
Thanks for any input.

[torakki]

[/quote]

"I remove the hose when warm" which hose? The one between the aar and the intake plenum?

Yes, to the intake plenum. And yes, the idle shoots up to over 2K. Used my thumb as a valve to bring the idle down to where it should be. I do feel good about the set up since I've worked on it, on and off, for years. Even had it a shop that supposed to know 914's. New everything, except the AAR, but rebuilt. Retard as in vacuum line to dizzy? Yes. As I recall, there were two different sides to the dizzy to connect it and I believe it's on the correct side. Base timing. I just check a photo when I was checking timing and it's from 2019. I don't recall.
The car never ran perfect. Didn't run when I got it, now runs great as long as you don't count the idle issue. I will check timing again, once I get our fence rebuilt.
Here's some before and after of the journey with this car. I was also getting cars at auction and repairing for a number of years so that's why this one got put in the back yard for long stretches.
Thanks again for the input...