Look at the picture I attached. Look at #6. Is that where the hose is coming off? The DPFE (Delta Pressure Feedback EGR) measures pressure difference between upstream and downstream side of the EGR valve. If it is blowing the hose off, my first guess is the EGR is blocked and causing pressure to build up and blow the hose off. Remove the EGR and check for carbon build up or something is plugging the intake, egr, or the vacuum hose itself. I have also attached a picture of the part that I think is the problem.
Let me know what you find.
Images (Click to make bigger)
Wednesday, February 2nd, 2011 AT 11:46 PM