Cummins isx 15 cuts out power at 1500rpm

Discussion in 'Trucks [ Eighteen Wheelers ]' started by mitmaks, 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.
     
  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.
     
  3. HoneyBadger67

    HoneyBadger67 Medium Load Member

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    Maybe a hole in charge air tube?
     
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  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
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  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?
     
  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.
     
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