So in the process of putting the Ln3 engine in my fiero, I also put the "tuned" manifold on...Which has an internal pcv valve, and an internal egr. So now i have wiring for an external egr...but no egr. Does anyone know how to fake a signal to the Ecm so i thinks that the egr is doing its job? (Im having drivability issues at the moment and i think this has something to do with it)

Did you swap or modify the heads to match the manifold for the PCV system? If not, you have no PCV system, not that it should cause driveability issues, but it should be operational, for other reasons. As for the EGR, as long as you are tuned to run without it, like some of the TPI engines were, it shouldn't cause any issues, except for the SES light. I would guess if you could simulate the coil resistance at the connections it would think it is still connected or just plug in the coil part and tie it out of the way.