Originally Posted by
Spaded_Z
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.
It would be helpful to me to know the model year of this 5.4, the specific DPFE DTC code, if there were any other codes, and the number of miles on this vehicle.
Originally Posted by
Spaded_Z
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.
This can cause a P0400 or P0401 DPFE code.
Originally Posted by
Spaded_Z
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
More than likely the infamous PCV elbow at the back of the intake manifold is leaking, and is not related to the EGR issue.