ISX hard to start rough idle.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Trouble65, Nov 23, 2010.

  1. Trouble65

    Trouble65 Medium Load Member

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    Jan 11, 2009
    Ontario Canada
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    Update:

    Cummins dealer replaced the pump under warranty.
     
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  3. Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    It is good!

    But as I know the next weak points are EGR and Turbocharger
     
  4. Gears

    Gears Trucker Forum STAFF - Gone, But Not Forgotten.

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    ....and Christmas is still a few weeks away and you got an early present:biggrin_255:
     
  5. Trouble65

    Trouble65 Medium Load Member

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    Jan 11, 2009
    Ontario Canada
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    That I did!
     
  6. Rookie O/O, vet driver

    Rookie O/O, vet driver Light Load Member

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    Oct 17, 2008
    Port Clinton, Ohio
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    Well, I just found this thread. I recently had the same problem. You won't see a leak until it's bad enough that she rocks the truck side to side for about ten minutes. nor while the truck is running, as it is sucking air into the system rather than pushing it out. You will notice fuel down on the frame, and you can smell it. But only if you turn on the ignition without engaging the starter for about five seconds, opening the hood, and looking for it before you start the motor. Glad you found your fix. Let's hope other ISX owners find this thread, as well. Cheers! and Happy Holidays to all!
     
  7. Pablo-UA

    Pablo-UA Road Train Member

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    Borispol, Ukraine
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    it is not so rare issue. No leak, but pump sucks air...
     
  8. troy476x

    troy476x Bobtail Member

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    Dec 23, 2015
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    I wish I could figure my 06 isx out. Runs great for about 300 miles and than starts cutting out / rough idle / smoke. . Shut it off for a few mins and runs great agian for awhile. Has new filters. Seems like running out of fuel??
     
  9. americanmadetrucker

    americanmadetrucker Logistical Engineer

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    Jul 3, 2012
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    Could be clogged up dozers. My truck with the same crappy Cummins isx just went thru it yesterday. Both dozers were clogged up. They replaced them. Check engine light went out. Came back on 400 miles later today. Same fault code. I have had nothing but issues with Cummins. Never had an issue with Detroit dd 15. Not one
     
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