1988 1ton won't stay running.

[jake10]

My 1988 1 ton with a tbi 350 will start if i pour in some gas but stalls right away. I can hear the fuel pump, tested the injectors with a 9v battery and both click fine. Loosened the fuel supply line on the tbi, I did get gas but it wasn't alot. The failure felt like running out of gas, towed it home and hasn't run on it's own since. What should I check next? Fuel pressure regulator? Should I go through the TBI? thanks

 

[RichLo]

Are the injectors actually spraying when your crank it over?

What is the fuel pressure?

It could be anything from a clogged fuel filter to clogged sock in the tank, weak fuel pump, bad FPR, clogged injectors, etc.