Well I bought a DPFE about two and a half years ago from advance auto and it lasted two years and check engine light came back on recently, lean codes and DPFE reading out of range, codes 335 and 332.
Replaced with the updated motorcraft unit as well as put in new bosch O2 sensors, but man what a difference in performance it makes.
Idles and accelerates smooth as butter, even during light acceleration.
gas mileage is up a little as well.
also if anyone is wanting to replace o2 sensors on there truck, directly after driving and exhaust system is hot, spray threaded areas of sensors liberally with PB blaster, and spray again a few hours after that and let it sit overnight, they came out with no struggle, however it was a little tight getting the right side sensor out.
