1988 2.5l fuel problems

[North Run]

So I've had my Comanche off the road since 2013. Started it up and dove it around the storage yards annually. Until the pandemic I never had an issue. The new owners felt the need to siphon my full tank of fuel. So when I went to pick it up last summer it was no go. Had to winch it onto and off the trailer to bring it home.

Due to a hip issue it's been parked and neglected since. Now I want to put it back on the road. It gets better fuel economy and funner to drive them my 2500HD.

It'll crank all day long but not fire. Lots of spark, fuel pressure at the TBI, not sure how much. I know I replaced the fuel pump back in 2011 or 2012. I pulled the fuel filter and when I turn the key, it only cycles for maybe 3 seconds. Having not driven or worked on my baby since 2012, I can't remember if that is normal. I'm at the point of dropping the tank and testing and inspecting. The last 3 days have convinced me the world has indeed moved on since 2012, lol. 3 days to get in a fuel filter, & distributor cap. Amazingly they still had spark plugs and a rotor cap. I foresee a trip into the closest city tomorrow morning and the closest pick n pull.

So long rambling story aside, is my pump running for 2-3 seconds normal? I wish I had not lent out my boroscope, it never came back :(, I know the tank was almost factory new when I replaced the pump the last time. Keeping a fuel tank completely full or completely empty makes a difference.

[North Run]

I forgot to mention, when I add fuel directly to the throttle body, it will start and run until I run out of added fuel.

[eaglescout526]

Sounds like the injector isn’t pulsing. 
has the pump been tested?