Truck revse up by itself while in neutral

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Jhimely23, Dec 15, 2015.

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  1. Dec 15, 2015 #1
    Jhimely23

    Jhimely23 Bobtail Member

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    My Cummins 350 Big cam revse up by itself without me pushing the gas. Has anyone had this problem before that can advise me the way to resolve this problem. Thanks in advance.
     
    Jhimely23, Dec 15, 2015
    Jhimely23, Dec 15, 2015
    #1
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  3. Dec 15, 2015 #2
    77fib77

    77fib77 Road Train Member

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    Are you consuming oil?
     
    77fib77, Dec 15, 2015
    77fib77, Dec 15, 2015
    #2
  4. Dec 15, 2015 #3
    77fib77

    77fib77 Road Train Member

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    . Could have oil going into turbo.
     
    77fib77, Dec 15, 2015
    77fib77, Dec 15, 2015
    #3
    tweeter15 and AModelCat Thank this.
  5. Dec 15, 2015 #4
    AModelCat

    AModelCat Road Train Member

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    Queue pants crapping moment at 1:36!

    At the OP: is it just a lazy and gradual rise in RPM or does it just take right off immediately?
     
    AModelCat, Dec 15, 2015
    AModelCat, Dec 15, 2015
    #4
  7. Dec 15, 2015 #5
    baha

    baha Road Train Member

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    Could be time to have fuel pump (one that pumps fuel to injectors) built?
     
    baha, Dec 15, 2015
    baha, Dec 15, 2015
    #5
  8. Dec 15, 2015 #6
    Jhimely23

    Jhimely23 Bobtail Member

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    Nov my oil is perfect
     
    Jhimely23, Dec 15, 2015
    Jhimely23, Dec 15, 2015
    #6
  9. Dec 15, 2015 #7
    Jhimely23

    Jhimely23 Bobtail Member

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    Just got it rebuilt, could it be a leak somewhere
     
    Jhimely23, Dec 15, 2015
    Jhimely23, Dec 15, 2015
    #7
  10. Dec 15, 2015 #8
    Jhimely23

    Jhimely23 Bobtail Member

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    It doesn't do it all the time. But sometimes is slow and other times its quick. I noticed yesterday. While it was rising, I pushed the clutch and it got higher quickly
     
    Jhimely23, Dec 15, 2015
    Jhimely23, Dec 15, 2015
    #8
  11. Dec 15, 2015 #9
    baha

    baha Road Train Member

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    You need to call shop that built your pump to tell them that its revving up with no pedal added, they should have you bring pump back to adj. pump maybe bring truck over to them so they can hear it?
     
    baha, Dec 15, 2015
    baha, Dec 15, 2015
    #9
  12. Dec 15, 2015 #10
    AModelCat

    AModelCat Road Train Member

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    I haven't been around the old Cummins long enough to know them super well but I do recall something about the governors on those trucks tending to stick or something and cause them to rev up and bounce off the rev limiters when the hand throttle was set for cold weather warm up. Not sure if there's a correlation there or not. Maybe @BoxCarKidd has some insight here?
     
    AModelCat, Dec 15, 2015
    AModelCat, Dec 15, 2015
    #10
    tweeter15 Thanks this.
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