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What does this box do? Detroit S60 14L 2008 bolted to intake manifold...

Discussion in 'Trucks [ Eighteen Wheelers ]' started by rbrauns, Dec 11, 2019.

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  1. Dec 13, 2019 #11
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

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    And good luck getting 7 mpg us out of a ddec 6. Never gonna happen.
     
    aaronpeterbilt3787, Dec 13, 2019
    aaronpeterbilt3787, Dec 13, 2019
    #11
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  3. Dec 14, 2019 #12
    rbrauns

    rbrauns Light Load Member

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    Did you clean out the DPF filter? If it is plugged, then the engine has too much back pressure and that will kill MPG.
     
    rbrauns, Dec 14, 2019
    rbrauns, Dec 14, 2019
    #12
  4. Dec 14, 2019 #13
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

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    Oh the dpf is cleaned out I’d say. Lol
     
    aaronpeterbilt3787, Dec 14, 2019
    aaronpeterbilt3787, Dec 14, 2019
    #13
  5. Dec 14, 2019 #14
    rbrauns

    rbrauns Light Load Member

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    Oh no. 5 MPG is all that I can expect? May have to sell my truck and buy something else. I read that the Series 60 is supposed to be one of the best engines for fuel economy so "enhancing" the EGR should make it great again.

    What have you tried to do to get your fuel mileage up? Apparently, the intercooler leaking is a MPG killer, as well.
     
    rbrauns, Dec 14, 2019
    rbrauns, Dec 14, 2019
    #14
  7. Dec 14, 2019 #15
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

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    Like I said. Have done everything. Complete in frame. Injectors. Harness. Turbo. Deleted. Tuned by diesel spec. A 14L will never ever get the fuel mileage a 12.7 will. And the ddec 6 is even worse. If you can sell, dump it. I wish I could.
     
    aaronpeterbilt3787, Dec 14, 2019
    aaronpeterbilt3787, Dec 14, 2019
    #15
  8. Dec 14, 2019 #16
    LoneRanger

    LoneRanger Road Train Member

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    They tuned it for power or fuel efficiency? Because both are different fuel curves.
     
    LoneRanger, Dec 14, 2019
    LoneRanger, Dec 14, 2019
    #16
  9. Dec 14, 2019 #17
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

    699
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    For fuel mileage.
     
    aaronpeterbilt3787, Dec 14, 2019
    aaronpeterbilt3787, Dec 14, 2019
    #17
  10. Dec 14, 2019 #18
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

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    I’m beginning to think it’s derated. But no cel. Gonna try unhooking batteries overnight and see what happens. Also Jake power is down like 40%. They use to #### near put me through windshield. Now sound like a homo farting.
     
    aaronpeterbilt3787, Dec 14, 2019
    aaronpeterbilt3787, Dec 14, 2019
    #18
  11. Dec 14, 2019 #19
    rbrauns

    rbrauns Light Load Member

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    Dec 7, 2014
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    Did you have the injector height set? I read a lot of comments about the DDEC 6 getting 5 MPG but other people tell me 7-9 is normal. My truck is in the shop getting to the bottom of the bubbles in the coolant system. Either bad head gasket, cracked head or cracked liner.
     
    rbrauns, Dec 14, 2019
    rbrauns, Dec 14, 2019
    #19
  12. Dec 14, 2019 #20
    aaronpeterbilt3787

    aaronpeterbilt3787 Medium Load Member

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    If ANYONE says they’re getting 7-9 mpg US out of a ddec6, they’re full of poop. Show me fuel receipts and trip books for company’s requirements, or ifta reports to prove it. Or else it’s pure bs.
     
    aaronpeterbilt3787, Dec 14, 2019
    aaronpeterbilt3787, Dec 14, 2019
    #20
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