Take the truck to ford and let them flash it and tell you what the problem is.
With no egr ford may not even fool with it EPA / federal law requirements.
The guy you bought it from was a backyard mechanic and dorked it up.
I've got 90,200 on my 06 King Ranch and Ford has replaced 2 alternators...
I've got a 2006 I don't know much about the new 6.7 as it is a radical new design with exhaust on the valley sides of the heads and intakes on the out side, just the reverse of a 6.0.
I had my 6.0 do the same thing and the dummy plug in the right head first then the left head next and the High...
