Airfoill, that's the problem... disabling the EGR on the 2.5 Turbo messes up the computer. There is a boost control flap/valve on the 2.5's that are computer controlled, and when the computer ain't happy, you lose power. That's why most people don't disable the 2.5 EGR. Installing a blank plate won't work either,
AFAIK....
