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Message: [QUOTE="Karen2.0, post: 858386, member: 12985"] Hi, I have 2009 f350 Spartan tuned, built transmission and a cold air intake My truck used to say it was gettin 27mpg+ and I would normally get 600+km a tank, but lately I fill my truck and move 20km and the needle has already moved I'll be lucky to get 450km a tank driving around like a perfect angel, I've tries changing tunes, putting in Lucas fuel saver, changing all my fluids nothing bringing it up, the truck feels more sluggish now to, I've cleaned the intake dozen times, still no better results I put my air dog fuel pump on, truck feels a little more sensitive with the throttle but still terrible fuel mileage, when I hand calculated it, I got 10.2 now that's even worse then before I did a dpf delete n everything else, know would anyone have a clue why my truck is doing this? I don't wanna take it to the dealer and a 1500$ bill for something stupid, Any suggestions or ideas would be great! Thanks [/QUOTE]

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