Sorry but this is going to be a little long winded so you know what I have done.
I replaced motor it's a 5.7 TBI motor ran great drove it for about hundred miles then had the trucks owner come pick it up.Next day calls me says fuel pump wont shut off so I find the wires to the oil sending unit are missing some insulation on wire so I tape it up and fixed.A week later calls me says if you gave it more than 1/4 throttle it would fall on its face.Checked fuel pressure was good but figured ok since the fuel pump staying on problem I changed pump and new filter ..Still give it more throttle than idle and it dies shot some carb cleaner with throttle opened up and it reved up great so I start replacing every sensor TPS O2 EGR the MAP the throttle body and distributor out of my running truck I even borrowed a computer out of identical truck there are no codes when I scan it .I cut exhaust in front of cat thinking maybe clogged mostly a frustration move on my part .
Heres my question I know the o2 tps map tell comp how much the injectors open Anyone have a trick to finding out where my problem lies I am writing this out of frustration before I break down and send to the dealer
As I said it starts idles give it fuel it dies starving for fuel
Made sure all grounds hooked up from body to engine etc.

Are you sure the injector(s) are not bad. Have you ohm checked them?

Try watching the actual fuel spraying out of the injectors as the throttle is opened. See if it's drippy or if the spray changes much. I know you put in a new fuel pump, and checked pressure, but I chased a similar problem around in an '89, and ended up needing a delphi fuel pump instead of the off-brand I first bought. You might also want to try rebuilding the throttle body, the kit is only about 20 bucks, and it comes with a new regulator.