No power on 04 6.0 f450

[TalonEclipseMixGsx]

I have an 04 F450 with a 6.0 that runs fine, but just has no power at WOT..
It started with a blown head gasket, I fixed that and the EGR cooler, and after that there is no power.

I have changed the variable vane sensor thing in the turbo, have changed the ICP and the EGR valve, still nothing. I also pulled the turbo off and pulled it apart to clean all the carbon off. Still nothing

I disconnected the exhaust before the catalytic converter to rule that out and still the same situation...

You can hear the turbo spooling like it is supposed to, I took the intercooler pipe going to the intake manifold to see if I was getting any boost and I was.

It does not have a boost gauge, and the Genisys that I was using will not read boost pressure....Is there something else Im missing? There is no CEL's. My next step is taking it to the dealer.

[TalonEclipseMixGsx]

Well since I hate seeing posts with a question that wasn't resolved, I figured Id stop by and say that the problem ended up being an Exhaust back pressure sensor, and a MAP sensor. Still not sure why neither tripped a CEL but whatever, its fixed.