"The vacuum hose likely goes to the PCV "

If so, it comes from a restricted port on the manifold, with a small orifice, which in normal operation has near atmospheric pressure (crankcase) so it won't be the reason the car doesn't start.

And, if the open hose isn't the reason no fuel is being injected, my suggestion would be to verify the fuel pumps are delivering fuel to the filter when the engine is cranked. The usual shade tree way this is done is to crack loose a fitting at the filter to see the spray of fuel under pressure. Not really safe. Another way is to bypass the fuel relay and listen without the noise of cranking:



This is the fuel relay found above the driver's left knee. It isn't necessarily green, but the wire colors on the six-place socket will identify it. To bypass it, the pins 30 (red), 87 (yellow/red), and 87b (blue/red) need to be jumpered together. The fuel pumps should then run without the key in. Fuel can be felt in the lines (cold) or pressure can be observed much more safely without the danger of live ignition.


--
Art Benstein near Baltimore

“Never underestimate the difficulty of changing false beliefs by facts.” --- Henry Rosovsky