You may recall my announcement that I finally found it ! the reason I can't check my oil with the engine running and the cap off.
https://forums.pelicanparts.com/porsche-911-technical-forum/1107581-911sc-stall-idle-oil-filler-cap-off.html
Well it worked , when the engine was cold-ish, but it was snowing outside, so tested in the garage only, with the door open , of course.
So, yesterday , I had the opportunity to take the car out, get it up to temp, and try it again. No deal, died right away.
The idle has always been at 1100 , can't get it any lower, even with it all turned in. That makes me think it must be a pesky air leak somewhere.
So, here we go again, I'll be looking for the dreaded air/vacuum leaks all over again, but I'll wait until the weather warms up a little .