I have an ’88 260E with 92k miles

I've read the SSS thread and others. changed the Idle Control Valve, Fuel Filter(which was fairly dirty).

I just noticed that the stalling and sputtering seems to be related to the A/C compressor. I'll start up with the A/C on and the car will barely run, pull over turn the key off and restart (the A/C compressor doesn't restart) and the car runs flawlessly. The A/C compressor won’t engage until the car ignition is turned off and back on. The Car will then run badly again until the ignition is turned off and back on.

PS the A/C works when engaged.