I'm calling mine good now. It has run great all week, no codes, everything has been perfect. What I learned: A bad DPFE does in fact reduce gas mileage-I got somewhere from 6-10 I'm guessing. A bad DPFE does affect how an engine runs, and idles. Most importantly, a bad DPFE, even though its electrical, can be intermittently problematic.
FordProbeGirl, did you ever figure out your problem?
P.S. is there a post on how to transform the back of an explorer into a bed, or even just bedliner that back? I may create a how-to on how to give the ex a metal truck bed, yet still have folding seats.
P.P.S. How about what to do when you snap off, or ruin the threads on the stupid front shock absorber stud mounts? Hint: I cut them off, drilled them out, and bolted those suckers on!