dd15 2012 bad mpg

Discussion in 'Freightliner Forum' started by 4noReason, Oct 11, 2019.

  1. 4noReason

    4noReason Road Train Member

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    i just did my q3 fuel numbers. i put 6 new injectors from detroit diesel in gary,in. and my avg came out 4.5mpg. 2012 cascadia. any idea on what i should do. ive been checking daily last 2 weeks im getting 6mpg a day minimum. but still very low imo. i replaced fuel sensor and fuel valve too.
     
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  3. tnevin225

    tnevin225 Road Train Member

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    First thing is start a good fuel mileage program, get a running 30 day average and see exactly what your fuel mileage is. What kind of truck and trailer set up do you have, Make model and year of truck. Transmission, rear ends. Do you pull flats reefer, van or tanker? There are 50 different reasons for the fuel mileage your getting so need good info to start helping you. Soor just realized you have a 12 Cascadia just need tranny and what rear ends.
     
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  4. uncleal13

    uncleal13 Road Train Member

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    First and cheapest, check the charge air cooler for leaks.
     
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  5. snowwy

    snowwy Road Train Member

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    I got 6 pulling flatbed in the western mountains. But my 12 was brand new. With a 13 speed.
     
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  6. truckdriver31

    truckdriver31 Road Train Member

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    spray starting fluid around your cac boots. both sides. spray the cac it self. do this when engine is cold. if it revs. then you got a leak
     
    joey8686, punksmacker and 4noReason Thank this.
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