I had that issue too, you might want to see what messed up the orig injectors, I found rust in the fuel rail, switched that and injectors and all is well on mine too. Congrats, it feels good when you find the problem.
'91 2WD RCSB
5.3l L59 DBW
4L80E
TR220 cam
RevMax 2800rpm stall converter
Schoenfeld LT Headers
Nelson tuned
My Truck Video - http://www.youtube.com/watch?v=Rw9y1...&feature=email