No throttle response

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

  1. draya93

    draya93 Bobtail Member

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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.
     
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  3. 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
  4. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Check power across your two small fuses. Check their ends also, and small ground
     
  5. 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.
     
  6. draya93

    draya93 Bobtail Member

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    Will do, thank you!
     
  7. 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.
     
    Concorde Thanks this.
  8. blairandgretchen

    blairandgretchen Road Train Member

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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?
     
    cke Thanks this.
  9. 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.
     
  10. draya93

    draya93 Bobtail Member

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    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
     
    baha, Bean Jr. and Rideandrepair Thank this.
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