having an issue after installing 2.9 throttle body and 2.9 intake manifold on a 2.8

[Itsnotascirocco 10]

I recently installed this 2.9 intake and throttle body onto my 95 obd1 coilpack vr. After Install cold idle is a little wacky. It idles at 1300-1500. After engine is hot the idle is normal at around 900. My main concern is with a stumble and cut out between 3000-4000 rpms. Under hard accelleration engine will cut out and then instantly come back hard and strong. Under light acceleration the problems shows itself as a missfire at 3000 until i get above 4000 rpms then it goes away. This is the same through all the gears. I have swapped out all the sensors associated with this swap as I had doubles from both intakes which are all the same part numbers. TPS, ISV (with and without the isv damper), Intake Temp sensor. I also retourqed the intake bolts. I used new gaskets. I have traced all the vacuum lines and have fixed a couple small leaks but no difference with my issue. Any other ideas? I spoke with some people in another forum about this and also spoke with a friend who is a vr guy and he is baffled. :scratch: