Ya but there has to be a shop in my area to put the computer back to stock that isnt a ford dealer...
well since you dont know & cant tell us what you have installed
we cant necessarily help you...
as others have said...banks has never made a downloader for the 6.0,
its a "flip chip"....remove the banks crap & you SHOULD be back to stock...
but again its hard for ANYONE here to know w/out photos or more info
on what makes you think you have a programmer or flip chip to begin w/.
stickers in a glove box could have been obtained from anywhere.
ive yet to see you mention anything of externally visable engine mods,
even a selector switch.
your crappy fuel mpg COULD be an indication but it could also be
an indication of other issues just as easily.