Could be....The newest wrinkle is, I let it warm up yesterday, let it sit for an hour or so... I went back out and started it. It started, and began to idle down, and stalled, and then wouldn't start right away.
Could it be the vacuum line on the fuel pressure regulator, or the is FPR failing?
The last time I had a car start and then stall like that, it was the idle air control valve on my Saab.