89 Iroc with a 350. Car would fire up in the summer and run with no issues. Put it away for a few weeks and now just cranks and sometimes stumble. Unplugged all 8 injectors and fired up first crank and eventually died due to no more fuel in cylinders. This would lead me to an air delivery issue? Not sure what I am overlooking here.

Things I have checked:
Timing is at 6 BTDC which is were it was while running previously
Have spark
Fuel pressure reaches and maintains 43 PSI
Ohm'd out each injector (about 16 ohms)
Noid light each connector (all flashing)
No codes (Other then code 12)
Have RPM when cranking
TPS reads 0.58V at closed throttle
Coolant temp and ambient air temp are < 5 degrees apart