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9-10mpg city.....WHY?????
Hey guys , i got a 2000 F350 4x4 4dr. Its got dp tuner with econ, 80 tow, 120, and 140, DIY intake, and muffler delete pipe. heres the issue, When i had just the dp i was getting about 14mpg and that was with me getting on it alot. i put intake and muffler delete on it and its down to 10mpg and thats without me getting on it at all. i went through 20 gallons like that.
I do have 35's on it and it has not been calibrated for them, but it was like that before the mpg drop.
please help me out its a work truck and cant afford this much longer
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