Originally posted by dkingofny:
Where is the DPFE sensor and what does it look like.
I'm not sure where the DPFE (Differential Pressure Feedback EGR) is located on your car, but the Ford TSP (Technical Service Publication) shows it just below the EVR (EGR vacuum regulator) attached to a bracket.
It looks like a small, silver, rectangular box with two black hoses (in your case one is missing) and an electrical connector coming out. It is about 4"x3"x3/4" (this is just an estimate from memory). It is attached by two bolts.
The DPFE is used to measure the flow (difference in pressure) of exhaust going from the lower exhaust manifold into the engine (via the EGR valve).