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No throttle response

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by draya93, Aug 13, 2022.

  1. Aug 13, 2022 #1
    draya93

    draya93 Bobtail Member

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    Aug 25, 2021
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    Have a 98 12.7 detroit. Yesterday, I had to jump start the truck. Had a miss and had throttle response. This morning, I put on new batteries and fired right up, but still has a miss and now no throttle response. Checked all connections and everything seems to be good. My voltage gauge shows 14v. All fluids are good. Any help is appreciated.
     
    draya93, Aug 13, 2022
    draya93, Aug 13, 2022
    #1
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  3. Aug 13, 2022 #2
    baha

    baha Road Train Member

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    Have you changed Fuel filters yet? Check the wires at plug in at the fuel pedal? `
     
    Last edited: Aug 13, 2022
    baha, Aug 13, 2022
    baha, Aug 13, 2022
    #2
  4. Aug 13, 2022 #3
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    May 2, 2021
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    Check power across your two small fuses. Check their ends also, and small ground
     
    Big Road Skateboard, Aug 13, 2022
    Big Road Skateboard, Aug 13, 2022
    #3
  5. Aug 13, 2022 #4
    draya93

    draya93 Bobtail Member

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    They get changed every oil change, I’ve got about 3k more miles to go before my next pm. I was actually thinking of changing fuel filters since it’s an easy option.
     
    draya93, Aug 13, 2022
    draya93, Aug 13, 2022
    #4
  7. Aug 13, 2022 #5
    draya93

    draya93 Bobtail Member

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    Aug 25, 2021
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    Will do, thank you!
     
    draya93, Aug 13, 2022
    draya93, Aug 13, 2022
    #5
  8. Aug 13, 2022 #6
    baha

    baha Road Train Member

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    One bad fuel stop can have you changing fuel filters 3 times a day till all of it gets run out of your tanks,you have to carry plenty spares in the side box.
     
    baha, Aug 13, 2022
    baha, Aug 13, 2022
    #6
    Concorde Thanks this.
  9. Aug 13, 2022 #7
    blairandgretchen

    blairandgretchen Road Train Member

    12,038
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    Dec 9, 2011
    South west Missouri
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    Connect software and drive for a cut-out test - if all else is OK, then cylinder cut out test for faulty injector?
     
    blairandgretchen, Aug 13, 2022
    blairandgretchen, Aug 13, 2022
    #7
    cke Thanks this.
  10. Aug 13, 2022 #8
    Rideandrepair

    Rideandrepair Road Train Member

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    Any codes? I’d suspect the throttle pedal sensor itself. Maybe check it for power coming in first. I’m sure there’s a procedure for testing it with a voltmeter.
     
    Rideandrepair, Aug 13, 2022
    Rideandrepair, Aug 13, 2022
    #8
  11. Aug 14, 2022 #9
    draya93

    draya93 Bobtail Member

    34
    14
    Aug 25, 2021
    0
    I got the throttle issue resolved. It was a bad ground, and dirty battery terminals but still getting a rough idle. Going to change fuel filters to see if it helps
     
    draya93, Aug 14, 2022
    draya93, Aug 14, 2022
    #9
    baha, Bean Jr. and Rideandrepair Thank this.
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