1996 Chevy Suburban 1996 Suburban Stalled. Won't start

I thought it has water in the gas, I cleaned the tank completely (removed and cleaned!). It had a SMALL amount of water and no contaminats.
It will not start unless I pour gasoline down the throttle body. And it will run as long as I pour gasoline into it.(Carefully).
Fuel line pressure is almost non-exsistant.I do not have apressure gauge. Very very little gasoline "spits out" when I press the inline valve.
Any ideas.
Thank You!