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Bad MPG 4.6 - Need Answers

Discussion in 'Trucks [ Eighteen Wheelers ]' started by CraziTrucker, Feb 11, 2012.

  1. Feb 11, 2012 #1
    CraziTrucker

    CraziTrucker Bobtail Member

    1
    0
    Feb 11, 2012
    Waterloo, Iowa
    0
    I own a 95 FLD with a Detroit 60 Series, last month or so I had the head gasket replaced, since then I haven't been able to get over 5 MPG,

    I had the Injector's looked at, timing done, overhead, compression test, computer diagnostics done, even had the head taken back off to see if I had a crack on the block, pistons, o rings, all done by Freightliner, and they cannot find out whats going on with the truck. I've spoken to a few fellow drivers, some say its a " Air Intake Sensor" other "Air Filter", but I would really appreciate some more answers and help.

    Please reply,

    Thanks,

    CraziTrucker
     
    CraziTrucker, Feb 11, 2012
    CraziTrucker, Feb 11, 2012
    #1
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  3. Feb 11, 2012 #2
    mgfg

    mgfg Road Train Member

    1,753
    626
    Mar 29, 2010
    0
    Air to Air CAC>test it
     
    mgfg, Feb 11, 2012
    mgfg, Feb 11, 2012
    #2
  4. Feb 11, 2012 #3
    apyles

    apyles Medium Load Member

    449
    142
    Oct 21, 2011
    Newbern,Tn
    0
    that's a first thing to do, then you can start checking other things , start with the easy things and work your way up
     
    apyles, Feb 11, 2012
    apyles, Feb 11, 2012
    #3
  5. Feb 11, 2012 #4
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
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    Injectors get put back in the correct location for injector calibration?
     
    Heavyd, Feb 11, 2012
    Heavyd, Feb 11, 2012
    #4
  7. Feb 12, 2012 #5
    Bob's Buzz

    Bob's Buzz Light Load Member

    96
    21
    Jan 15, 2011
    Georgetwn, Calif.
    0
    Got the same power as before!? or less
    Have a Boost guage?
     
    Bob's Buzz, Feb 12, 2012
    Bob's Buzz, Feb 12, 2012
    #5
  8. Feb 12, 2012 #6
    JohnP3

    JohnP3 Road Train Member

    1,594
    684
    Feb 21, 2010
    Rock Creek B.C. Canada
    0
    When ever I got a customer complaining of poor mileage and there was a lot of stuff already done I would get a history printed out and see what speed and RPM they were driving at. It was amazing people would cruse at 1800 RPM and 70 MPH and expect to get mileage. I had one that had 67% idle time.
    The owners usually would want a copy, lots of times, the truck would sit in the yard for a couple of days and a new driver would pick it up.
    Just a thought!
     
    JohnP3, Feb 12, 2012
    JohnP3, Feb 12, 2012
    #6
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