So a few months ago my Expedition (5.4L) threw the code for the DPFE, the truck started running rough, hesitations, no power, horrible gas mileage, etc.

Before I could replace the DPFE (funds), I tossed a piece of aluminum can between the EGR and the manifold to see if that would make the symptoms go away, it didn't. The rough idle/running is still there, so I parked it and used it only for emergency trips.

I then replace the DPFE and the code is cleared but the rough idle/running still exists, I'm curious if anyone has any ideas what it could be now since I had the EGR blocked off and still had the rough running. Anyone have any ideas? I've got to get this thing back in operation for a camping trip in the middle of August.

Thinking I need to clean the IAC and then spray around the engine bay with some carb cleaner to see if I have a vacuum leak. But wanted to start a post here first.

Thanks for any help

Adding link(s) to DPFE troubleshooting thread(s):
Focus Shacks - DPFE Sensor and EGR Information