throttle pedal problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dismag, Jul 20, 2012.

  1. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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    for last one month i have that problem on my Columbia 2005. The engine starts fine the problem is that throttle pedal doesn't accelerate some time and some times just disappear at the time i am driving. Went to several shops they replace censor, problem disappear for one week and then come back again. So frustrating because I have already spent $$$. Just want to see may be some one here had the same problem. Please let me know or if you have any advices please share with with me. Thank you in advance.
     
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  3. bender

    bender Road Train Member

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    Jul 20, 2010
    Don't Kid Yourself
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    Wear in the pedal assembly itself causes this problem. The whole pedal assembly needs to be replaced to cure it, not just the sensor.
     
    dismag Thanks this.
  4. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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    ok thank you. I will replace it and let you know if it was the cause.
     
  5. Shaggy76

    Shaggy76 Heavy Load Member

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    Feb 22, 2012
    Orlando, FL
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    It will be the cause.
     
    dismag Thanks this.
  6. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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  7. T800H

    T800H Medium Load Member

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    Apr 2, 2010
    The Keys
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    before you replace the pedal make sure all the terminals at the batteries are clean and there's good connection, hopefully a loose battery nut will the problem.

    let us know what was it.
     
  8. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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    replace pedal same problem
     
  9. MNdriver

    MNdriver Road Train Member

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    Feb 24, 2012
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    wished I would have seen this earlier.

    go get yourself a small volt/ohm multimeter. I got mine from walmart.
    http://www.walmart.com/ip/GE-Analog-Multimeter-14-Range-6-Function-Yellow/17117738

    Use it to test things like your foot pedal BEFORE you replace it.

    You need to use an analog on these because as you press the pedal, it's moving a potentiometer. It's basically a wire wrapped around an insulator core with a copper sweep on it.

    It sits there all day long in the same spot and can wear a dead spot into the resistor side.

    The only way to spot if it's bad is as you are pressing the pedal down with the ohmmeter hooked up, you will see the dead spot as a quick jump in the needle. It will go open and then come right back. Something you will NEVER see with a digital meter.

    You can also use it for testing for bad wiring harnesses and connectors. Same thing. Needle will bounce when it sees a sudden open as you flex wires or move a connector and it comes back.

    nice way to test for intermittent problems.
     
  10. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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    all of a sudden dash board panel stop working and that throttle pedal not working but engine starts okey.
     
  11. dismag

    dismag Bobtail Member

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    Jul 20, 2012
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    I have that code error MID 128 SID 91 FMI 3 Fault 21 what it can be?
     
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