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2007 Freightliner Classic Detroit 60 Low MPG

Discussion in 'Freightliner Forum' started by tallmon, Mar 24, 2015.

  1. Mar 24, 2015 #1
    tallmon

    tallmon Medium Load Member

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    Oct 22, 2014
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    I inherited a 2007 Freightliner Classic with a Detroit 60, 14L, 515HP, Eaton 13 speed, 1.3 mil miles, rebuilt at 800k, super singles on the drives. We pull tandems for FedEx.

    This thing gets 5MPG when I think I should more likely get 6+ The driver on it is a good driver, 15+ years, and gets good MPG's when he drivers my KW's.

    Trucks runs fine and smooth, no codes, no issues.

    What do you think it should be getting? Can the ECM be tuned or something like that?

    thanks
     
    tallmon, Mar 24, 2015
    tallmon, Mar 24, 2015
    #1
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  3. Mar 24, 2015 #2
    bad-luck

    bad-luck Road Train Member

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    Baltimore, Maryland
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    may need a tune up, such as the injectors adjusted the valves adjusted and the Jake adjusted. Thats where i would start.
     
    bad-luck, Mar 24, 2015
    bad-luck, Mar 24, 2015
    #2
  4. Mar 25, 2015 #3
    RERM

    RERM Road Train Member

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    Chicago, IL
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    Google "Ugly FIx Charlotte"........yes, it does work.
     
    RERM, Mar 25, 2015
    RERM, Mar 25, 2015
    #3
  5. Mar 26, 2015 #4
    Smellfunny

    Smellfunny Road Train Member

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    Have overhead run by someone that knows how to do it.
     
    Smellfunny, Mar 26, 2015
    Smellfunny, Mar 26, 2015
    #4
  7. Mar 26, 2015 #5
    mhyn

    mhyn Road Train Member

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    Northridge, CA
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    3 years a go I did tune up at w.w. williams -Columbus, oh. they adjusted valves, injectors, jake, turbo and updated ecm software.. they charged me $ 730. I had about 0.8 mpg increase. 05 s60 14l engine.
     
    mhyn, Mar 26, 2015
    mhyn, Mar 26, 2015
    #5
  8. Mar 26, 2015 #6
    Smellfunny

    Smellfunny Road Train Member

    1,395
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    Jan 28, 2012
    South Carolina
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    Usually after I run an overhead people come back in saying they save 300-350 a week in fuel.
     
    Smellfunny, Mar 26, 2015
    Smellfunny, Mar 26, 2015
    #6
  9. Mar 27, 2015 #7
    tallmon

    tallmon Medium Load Member

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    It had the overhead run about 5 months ago. I'm going to schedule it for valves/injectors/jake adjustment + ECM programming for "economy mode"
     
    tallmon, Mar 27, 2015
    tallmon, Mar 27, 2015
    #7
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