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Cummins isx 15 cuts out power at 1500rpm

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mitmaks, Jul 21, 2019.

  1. Jul 21, 2019 #1
    mitmaks

    mitmaks Road Train Member

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    I have my 13 KW T660 with isx15 450hp and it cuts out power at 1500rpm. Diesnt matter if I'm going uphill/downhill loaded/empty. It doesn't accelerate fast either. It takes a bit if time for rpm to go up to 1500rpm. Its almost like its derated but there's no codes. I notice it happens in low gears, high gears I can get it to go past 1500rpm but engine seems to struggle still.
     
    mitmaks, Jul 21, 2019
    mitmaks, Jul 21, 2019
    #1
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  3. Jul 21, 2019 #2
    stillwurkin

    stillwurkin Road Train Member

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    Could be many things. Fuel filters been changed lately? Mayby a dose of dirty fuel? Air filter(s)? Thats the easy stuff.
     
    stillwurkin, Jul 21, 2019
    stillwurkin, Jul 21, 2019
    #2
  4. Jul 21, 2019 #3
    HoneyBadger67

    HoneyBadger67 Road Train Member

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    Maybe a hole in charge air tube?
     
    HoneyBadger67, Jul 21, 2019
    HoneyBadger67, Jul 21, 2019
    #3
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  5. Jul 23, 2019 #4
    Petty Cash

    Petty Cash Light Load Member

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    Optional ECM settings like load based speed control, gear down protection, etc. The ISX I had was a former fleet truck with all the babysitting settings in the ECM. Once I had all that stuff changed, it became a completely different animal.
     
    Last edited: Jul 23, 2019
    Petty Cash, Jul 23, 2019
    Petty Cash, Jul 23, 2019
    #4
    mitmaks Thanks this.
  7. Jul 26, 2019 #5
    Carlinho

    Carlinho Bobtail Member

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    Can a Kenworth dealer get rid of all the safety parameters on a former fleet truck or does it have to be done by Cummins?
     
    Carlinho, Jul 26, 2019
    Carlinho, Jul 26, 2019
    #5
  8. Jul 26, 2019 #6
    Petty Cash

    Petty Cash Light Load Member

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    A KW dealer should be able to. I had the carrier I leased on to at the time do it.
     
    Petty Cash, Jul 26, 2019
    Petty Cash, Jul 26, 2019
    #6
    Carlinho Thanks this.
  9. Mar 28, 2022 #7
    Uruguayo

    Uruguayo Bobtail Member

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    Uruguayo, Mar 28, 2022
    Uruguayo, Mar 28, 2022
    #7
  10. Mar 28, 2022 #8
    Uruguayo

    Uruguayo Bobtail Member

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    Did you find out what was the problem.?
     
    Uruguayo, Mar 28, 2022
    Uruguayo, Mar 28, 2022
    #8
  11. Mar 28, 2022 #9
    mitmaks

    mitmaks Road Train Member

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    Сummins set rev limit at 1500
     
    mitmaks, Mar 28, 2022
    mitmaks, Mar 28, 2022
    #9
    Uruguayo Thanks this.
  12. Mar 29, 2022 #10
    kranky1

    kranky1 Road Train Member

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    That would be my guess. One of my O/O’s got a CM2250 that had been on a fleet. His 450 was down rated to 400/1750 with all the lame accountant specified progressive shifting torque limiting bs enabled.
     
    kranky1, Mar 29, 2022
    kranky1, Mar 29, 2022
    #10
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