i tried getting the egr valve out but it wont come out.Personally, I would inspect the VGT vanes and the EGT valve. If the vanes are all coked up, it can blow the seals on the valve.
Did the seat of your pants show a drop or just the gauge? Mine dropped and I found that my gauge tube connection had ruptured. Got to go fix that this evening when it cools off. :doh: