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Terrible gas mileage on 12' T700...

Discussion in 'Kenworth Forum' started by magellan, Apr 18, 2016.

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  1. Apr 18, 2016 #1
    magellan

    magellan Light Load Member

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    Feb 8, 2016
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    Just purchased a T700 from MHC, took it out for a week and I am averaging about 3.2 mpg, pulling 31,000 flat terrain. I took it to the dealership and they are wanting $1400 for overhead adjustment and a fuel control valve. Speaking to some veterans out there, does this sound like the thing that should resolve the issue?
     
    magellan, Apr 18, 2016
    magellan, Apr 18, 2016
    #1
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  3. Apr 18, 2016 #2
    Bakerman

    Bakerman Road Train Member

    4,663
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    Jan 27, 2013
    Phoenix, AZ
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    If it's brand new , it will take a while to get broken in,,,,,,,,,I'm assuming.
     
    Bakerman, Apr 18, 2016
    Bakerman, Apr 18, 2016
    #2
  4. Apr 18, 2016 #3
    bzinger

    bzinger Road Train Member

    16,252
    62,912
    Dec 10, 2014
    omaha , ne
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    Gas ? ..
     
    bzinger, Apr 18, 2016
    bzinger, Apr 18, 2016
    #3
  5. Apr 18, 2016 #4
    Dakota1358

    Dakota1358 Medium Load Member

    431
    500
    Jun 15, 2009
    Staunton,Va
    0
    Your biggest problem is you're putting gas in it
     
    Dakota1358, Apr 18, 2016
    Dakota1358, Apr 18, 2016
    #4
    CrappieJunkie, Straight Stacks, Bakerman and 1 other person Thank this.
  7. Apr 18, 2016 #5
    magellan

    magellan Light Load Member

    65
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    Feb 8, 2016
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    Smart Alec's... Fuel/Diesel/liquid go... better?
    It's got about 470k on the engine.
     
    magellan, Apr 18, 2016
    magellan, Apr 18, 2016
    #5
  8. Apr 18, 2016 #6
    truckthatpassesyouby

    truckthatpassesyouby Road Train Member

    1,876
    6,124
    Jun 3, 2015
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    Is there a Yelp for diesel shops? sounds like all you need is a second or third opinion and a cheaper deal
     
    truckthatpassesyouby, Apr 18, 2016
    truckthatpassesyouby, Apr 18, 2016
    #6
  9. Apr 18, 2016 #7
    Bakerman

    Bakerman Road Train Member

    4,663
    8,806
    Jan 27, 2013
    Phoenix, AZ
    0
    What year, what engine, check air filter, check muffler-have them check the overhead.

    You've just bombarded us with all this information, we don't know what to do with it all!
     
    Bakerman, Apr 18, 2016
    Bakerman, Apr 18, 2016
    #7
  10. Apr 18, 2016 #8
    magellan

    magellan Light Load Member

    65
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    Feb 8, 2016
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    2012 KW t700, 470k miles, Paccar MX. That is all the information the dealership gave me so far. Waiting until morning to decide what to do. Like I said, they said I need an overhead adjustment and fuel control valve. I'll call around tomorrow.
     
    magellan, Apr 18, 2016
    magellan, Apr 18, 2016
    #8
    truckthatpassesyouby Thanks this.
  11. Apr 18, 2016 #9
    JAYRODPA

    JAYRODPA Light Load Member

    157
    109
    Apr 10, 2009
    Dingmans Ferry pa
    0
    Is it blowing smoke? if not I doubt if the fuel control valve. Are the valve real loud. and is if egr? if it is, with 470, and never replace, it probable is on it's way out. how is the power ?
     
    JAYRODPA, Apr 18, 2016
    JAYRODPA, Apr 18, 2016
    #9
  12. Apr 18, 2016 #10
    magellan

    magellan Light Load Member

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    14
    Feb 8, 2016
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    No smoke, power seems fine. I'm coming out of a 15 Volvo 780, seems comparable, if not a little better toting the load up inclines.
     
    magellan, Apr 18, 2016
    magellan, Apr 18, 2016
    #10
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