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7.3 HORRIBLE Fuel Mileage!!!
Hello all, newbie here from all the way out in Saskatchewan Canada!
Not to sure if you would be able to help me out but I got an odd Ford 7.3 question for you! (I have done a ton of reading so far and I see others have also kind of had similar issues but cannot find the exact issue yet!)
I recently picked up an 02 Ford F-250, Crew Cab, Short Box, 4" lift on 35's, other then that bone stock, no chip, straight piped. On the highway fuel mileage was alright for being bone stock, I did 180 K on 30 bucks so not to bad considering the lift/tires and cold weather.
I recently found out if you go WOT only sometimes it will throw a CEL, loose all power and almost fall on its face, lift the throttle up to about half gas and it will gladly take off and run fine again.
I scanned the truck for codes and it isn't throwing anything... I have read non stop and cant figure out this issue. I replaced the fuel filter today and the issue is still there. (Heard it may also be the filter in the tank or maybe the FPR?)
At first I thought maybe when the glow plugs were done that an injector wire got pinched but wouldn't that make an issue all the time and not only just under WOT? (Originally a wire did get pinched but Ford replaced it and supposedly all was good to go...)
Like I said, the issue isn't all the time, just sometimes under WOT.
Also the fuel mileage in the city is HORRIBLE. I have now done 240K and only have a quarter tank of fuel remaining, the truck was full to start. ... (I know 7.3's aren't a real gem on fuel but it shouldn't be this bad?)
I also let it warm up in the morning since it is quite cold here recently been about -25 (For the American's that works out to -13, I think!) I let it sit on high idle for about 10 minutes minimum or until the needle is off the white box on the temperature gauge. I don't think these warm ups should be harming my fuel mileage this horribly though!
Could anyone by chance please point me in the right direction?
Thank you everyone very much for your time!