Have 4.3 and is runs for a minute then runs rough until it dies replaced injectors and fuel filter when you step on gas is stalls and sputters computer shows 1.5 then goes to 4.0 on fuel until it stalls out

 

Kinda going out on a limb, but have you checked your MAP sensor? I was having a similar issue, and it turned out to be the MAP. Will it idle until you open the throttle?

Also, what are the codes? If you have obd 1, it's as simple as using a paperclip. obd 2, and Autozone can do it. If you are unfortunate enough to have obd "1.5", it's going to be tough.