1LW cat bucking

Discussion in 'Questions From New Drivers' started by Shives, Jul 17, 2015.

  1. Shives

    Shives Bobtail Member

    27
    0
    Jan 1, 2009
    Devlin, Ontario
    0
    have a 99 Kenwoth with a 1LW cat, when the air temperature gets above 80 F, and pulling hard.
    It starts bucking as if the Jake head is stuck on. Have had it in to diagnose and no help as of yet.
    No engine code is coming up, only does it in the top 3 gears.
     
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  3. BigCam9670

    BigCam9670 Medium Load Member

    414
    4,579
    Jun 12, 2012
    Hudson, NY
    0
    Do you have a fuel pressure gauge in the cab? Demand for fuel is highest in the higher gears, could be starving for fuel.
     
  4. BigPete23

    BigPete23 Bobtail Member

    2
    0
    Jul 30, 2014
    Quahog, Rhode Island
    0
    Fuel lines colapsing in the inside..... Book it.
     
  5. SHO-TYME

    SHO-TYME Road Train Member

    3,425
    3,177
    Apr 20, 2011
    Dahlonega, GA
    0
    Change you fuel filters first and see what happens, CATs LOVE fuel and start getting real finicky when they don't get all the fuel they want.
     
  6. 315wheelbase

    315wheelbase Heavy Load Member

    783
    600
    Oct 26, 2014
    0
    you could be getting air in you fuel system,check to make sure your fuel filter is tight and you secondary fuel filter too if you have one you could be sucking air in the system,,aslo could be your electronic accelerator pedal going bad
     
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