Lee,

It's clear that the initial problem of high revs was a defective AAV, so this problem is solved (its causes) or you are in the process of replacing the AAV.

There seems to be two additional problems from your post:- a) stalling due to low revs on load and b) hot-starting problem. It would seem to me that due to a defective AAV causing high revs it has masked these two other problems by compensation with high revs (costly in fuel) and there has been an attempt to compensate by adjusting the idle regulator screw (the nylon screw with a spring) and now that the AAV excessive air volume has been restored to normal (by blocking the AAV or replacing it) the idle adjusting is too low.

Low revs on load and timing advance have a knock-on effect on each other. I suggest to stabilize timing back to "0" (TDC) to eliminate this contributory factor to the two problems at hand for the time being (afterwards you can advance timing for performance but to no more than 5 degrees BTDC as over 5 degrees it has other repercussions at low revs). The timing back to "0" should be done with engine at operating temp and vacuum advance disconnected and blocked. Then start the engine and engage gear in "D". The idle revs should be adjusted to 500 RPM minimum in gear. (Your symptom of stalling when on a turn indicates de revs falls lower as the steering power pump adds to load when in gear and the engine can't cope).

With regards to problem b) there are a number of factors that can cause these symptoms, e.g.: Loss of Rest Pressure, improperly adjusted airflow sensor, sticking or binding control plunger, leaking injectors, leaking cold-start injector or shorted thermo-time switch, incorrect control pressure, defective fuel-pump check-valve, and others….
For each of these possible factors there are specific procedures for testing and verifying but at this stage I suggest you attend to sort first problem a) as you did (or are in the process of) with the AAV. Will assist you with problem b) once a) is out of the way and the reasons for this are that sorting problems out of sequence creates compensating "cheating" as in the case with the AAV and when the "cheat" is sorted out problems masked by the cheat become apparent.

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Deltacom ~ Absit Iniuria Verbis ~