Jkk7_3
New member
I have a 1995 f350 7.3 extended cab dually, 2wd, the truck has gotten about 10mpg for the past many years of its life unloaded, I see exact same trucks, extended cab dually 2wd 7.3's getting 22mpg. Multiple buddies of mine have highly lifted 4wd vehicles getting 21-22mpg, and I don't understand why or how their lifted 4wd 7.3s are getting so much better mileage than a 2wd stock height 7.3, it's been getting this type of mileage since it was completely stock. Any input is appreciated on what it could be, I'm thinking possibly pcm, as the truck has had previous serious electrical problems. Could it be pcm? Anything else?