Just can't seem to find the problem is my problem, check the plugs and surrounding wires, voltage readings, but for sure an injector was cutting out, checked spark and it was fine, it's either the injector or electrical to the injector, I will be removing the TB, Plenum and replacing the front passenger side HVLA.. while it's in that state I'll replace the injectors, check all wires and lines.

91 (Gen1) Monty, 3.0L V6, Auto 4 Door.
Disabled Driver.