I went back to basics on this and checked it for vacuum. Below vid is the result:
Thats directly off the manifold. While the clip is only 10 secs long, you can see the flutter and how low the vacuum is. Interestingly immediately upon start up I had ~28" (I live ~1000' elevation) and it slowly went down as the engine warmed up. This video was about the mid point. After a few minutes the car died.
I ran a smoke test and came back with no leaks. Im pretty mechanically inclined, this makes me think valves or timing, but this issue didn't show up until after
I dealt with the other problems (I replaced the fuel pump, cleaned the MAF and throttle body and replaced the throttle pedal assembly.) Could a damaged MAF lead to this? doesn't seem like it would change the vacuum, unless there is some sort of computer controlled advance that's getting off?
Im at a loss, and could use a hand.