Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

Cummins ISM surging problem no CEL or codes

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by TheMechanic, Dec 8, 2017.

  1. Dec 8, 2017 #1
    TheMechanic

    TheMechanic Bobtail Member

    16
    0
    Jul 24, 2013
    Jacksonville,Florida
    0
    06 ism 320k miles. Empty loaded bobtail doesn’t matter. Surges thru all gears. As it starts to pull then power seems to be halted but the turbo continues to spool. It will do this continuously thru the entire gear up down up down. If i shift while acting normal it shifts normal. If i do it while its acting up it will sort of sneeze access boost. When ever it surges it puffs black smoke
    Just had everything run thru insight. Ran turbo and actuator test passed. Egr test passed.

    Just looking to be pointed in the right direction
     
    TheMechanic, Dec 8, 2017
    TheMechanic, Dec 8, 2017
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Dec 8, 2017 #2
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    Unplug the egr valve and road test. After that, install a mechanical fuel pressure gauge and make sure the pressure is about 120 psi at 1200 rpm. I would also check for aerated fuel, but you need to install a clear test line between the suction line and pump for that.
     
    Heavyd, Dec 8, 2017
    Heavyd, Dec 8, 2017
    #2
    TheMechanic and BoxCarKidd Thank this.
  4. Dec 8, 2017 #3
    TheMechanic

    TheMechanic Bobtail Member

    16
    0
    Jul 24, 2013
    Jacksonville,Florida
    0
    Egr unplugged it still surges the same but no black smoke
     
    TheMechanic, Dec 8, 2017
    TheMechanic, Dec 8, 2017
    #3
  5. Dec 9, 2017 #4
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    Ok, try the fuel checks if you can.
     
    Heavyd, Dec 9, 2017
    Heavyd, Dec 9, 2017
    #4
  7. Dec 13, 2017 #5
    TheMechanic

    TheMechanic Bobtail Member

    16
    0
    Jul 24, 2013
    Jacksonville,Florida
    0
    Fuel is right at 1200 psi. No air in clear fuel test line
     
    TheMechanic, Dec 13, 2017
    TheMechanic, Dec 13, 2017
    #5
  8. Dec 13, 2017 #6
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    See if you can unbolt the egr mixer pipe at the intake horn and install a piece of plate steel to block the intake pipe and try again.
     
    Heavyd, Dec 13, 2017
    Heavyd, Dec 13, 2017
    #6
  9. Dec 13, 2017 #7
    TheMechanic

    TheMechanic Bobtail Member

    16
    0
    Jul 24, 2013
    Jacksonville,Florida
    0
    Do this with egr plugged in or unplugged
     
    TheMechanic, Dec 13, 2017
    TheMechanic, Dec 13, 2017
    #7
  10. Dec 14, 2017 #8
    Heavyd

    Heavyd Road Train Member

    7,812
    6,265
    Feb 4, 2009
    0
    Plugged in. You are just physically blocking the egr piping from the engine intake to test to see if the egr valve is partially stuck open or won't fully close.
     
    Heavyd, Dec 14, 2017
    Heavyd, Dec 14, 2017
    #8
  11. Jul 21, 2020 #9
    Vurtle

    Vurtle Light Load Member

    69
    39
    Mar 9, 2012
    Tx
    0
    TheMechanic... Did you ever get this resolved and if so, what did you find? We have one with the exact same symptom.
     
    Vurtle, Jul 21, 2020
    Vurtle, Jul 21, 2020
    #9
  12. Aug 3, 2020 #10
    Vurtle

    Vurtle Light Load Member

    69
    39
    Mar 9, 2012
    Tx
    0
    No reply, but for anyone else using the search function and looking for an answer, we had to replace the turbo. 05 International with ISM.
     
    Vurtle, Aug 3, 2020
    Vurtle, Aug 3, 2020
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.