car sat 5 years.Flushed and cleaned the tank,Pump,replaced the filter,freash fuel.

Pump has to be hotwired to start and even then have to put fuel in airfilter box to get it run,,still only till the fuel is gone.
All fuses are good
bled line.
could it be the pump pressure,or
Losing signal to pump and injectors?

Thank you,
Leroy Anderson
Alb. NM