2015 cascadia with dd15 miss fire

Discussion in 'Freightliner Forum' started by kamiondjija68, Aug 5, 2020.

  1. kamiondjija68

    kamiondjija68 Bobtail Member

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    May 20, 2020
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    I have a 2015 cascadia with a dd15 engine. The engine makes a miss fire at a temperature between 150 and 165 at low speeds from 600 to 900 rpm usually when I start driving. So far I have changed twice the injectors, injector harnes, ecm, fuel quantity valve, delta presure sensor and cleaned pipe, intake valve , checked the fuel system for leek three times. All this was done on ww williams under warranty, and they still can't find the problem. Has anyone had a similar problem.
     
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  3. RocketyMan

    RocketyMan Medium Load Member

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    Was a valve clearance check done? What cylinders are misfiring? Did you do a relative compression test?
     
  4. kamiondjija68

    kamiondjija68 Bobtail Member

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    May 20, 2020
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    They do lot of tests. They send the long file to detroit diesel many times. I am not sure what kind the rest they are don.
     
  5. Getsinyourblood

    Getsinyourblood Road Train Member

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    I was a company driver that had a 2010 Freightliner with a pre-emisions dd15. I would get about 2 dead misses a day, traveling at highway speeds. I couldn't find anyone who could diagnose the problem. Finally one day, the fuel rail failed, and diesel sprayed all over the engine. I took these two pictures while the mechanic ran to Joplin and picked up the part. The dead misses was the engine sucking air. IMG_20160815_142513.jpg IMG_20160815_142502.jpg
     
    uncleal13 Thanks this.
  6. kamiondjija68

    kamiondjija68 Bobtail Member

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    May 20, 2020
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    I saw a little wet in the same place as in the picture. Maybe that's a problem, and I'll take a look. Thank you very much I will post if there are any changes when I fix it.
     
  7. kamiondjija68

    kamiondjija68 Bobtail Member

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    May 20, 2020
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    They finally found out what the problem was. The fuel filter housing had a leak so they changed it, and they changed the fuel pump and fuel lines. I now have a complete new fuel system
     
    Getsinyourblood and Wasted Thyme Thank this.
  8. RocketyMan

    RocketyMan Medium Load Member

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    Oh good! I wonder if they ran an FSIC routine to determine that. THank you for reporting back!
     
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