Re: 98 f150 4.6 bad MPG W/ no cats?
o2's are still in place and hooked up, i have been wanting to do the DPFE for awhile and see what happens, maybe next check.
Before the truck ever broke down almost 3 years ago it had the 401 and 402 codes and was still getting around 16 - 17 and had some power. maybe 15 at the very lowest. The last owner did buy the DPFE but it was the duralast one from autozone and even when he put it on it still would throw the same code.
I've check the piping to the EGR and thats good, EGR valve, Vacuum Solenoids, Throttle body holes, and everything else in the EGR system is good and new but the DPFE