930 will start!
Dear 930 dudes,
Thanks for all your helpful advice and comments, the fix is in.
Dan, you were right on the money, the vac leak bug strikes again.
The fitting in the center of the intake plenum below the cold start valve for the warm up idle bypass valve blew out of the intake manifold.
Leaving a quarter sized hole to suck in free air. I guess there was too much sucking here!
A little JB weld fixed the fitting in there for good. I think it was swaged or epoxied in or something, CARS!