Update--I made a blocking plate and put it between the egr and the housing. Still something cut the power (cut boost for sure, maybe fuel also). I called a service manager I know and his only advice was to bypass the turbo boost pressure valve-- He said it is the one beside the intake manifold. Connect the two vacuum lines together. Only thing if an overboost condition was ever to happen, it could fry the engine (what he says). Still don't know if that would completely solve the power issue.
I just don't know how the engine knows that it is not getting egr. I cannot see anything downstream that could be sensing it. Maybe it could be the airflow meter upstream that is telling the computer that more air is flowing past it because it is not getting any exhaust air.
Any thoughts anyone!
136,000 miles and climbing