The car is relatively low mileage (120,000 about).
Fuel filter looks original, and I couldn't verify fuel at the rail as I couldn't find a schraeder valve to depress. But fuel pump turns on when cranking.
Plastic elbow from afm to throttle body is in great condition, but was loose at the throttle body. Tightened, and still same no start issue.
I was looking at the cold start injector as a possibility also, and even maybe the tps.
The car ran great Saturday, then Sunday, he went to show the car to someone and it wouldn't start.
I have not had a moment to head back over there to investigate further. Maybe next Sunday.
Thank you for the pointers