Need help from any DD16 guru's.

Discussion in 'Freightliner Forum' started by Codynidaho, Jun 2, 2017.

  1. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    Okay. I just tried externally priming the system again. As I kept pressure In the external primer tank, I could feel the fuel being forced into the system.. as it was doing that, I checked the fuel tanks with a flashlight. I discovered the right tank making lots of noise and seen fuel rushing in... So now I know that a check valve is stuck. I just don't know which one or where it is. If someone could help me on locating the right one, that would be sweet.
     
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  3. little cat 500

    little cat 500 Road Train Member

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    id feed that sob ether till it picked up not making any money sitting there lol not a good idea but sounded good
     
  4. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    I have fed it ether... Except ether won't stop the fuel from just flowing back into the fuel tank. Lol so I'm replacing my two stage fuel valve that's in the pump as well as the injector lines, and the two high pressure lines since they are technically a one time use lines. As well as the common rail since that was the original problem from the beginning. I'd hate to spend the money on all this just to continue to have a fuel leak from the rail.
     
  5. Animosus

    Animosus Heavy Load Member

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    The pressure limiting valve is on the back side of the fuel rail (like towards the firewall back). That bano bolt is the return line for the PLV, there should be very little fuel flow through that line ever.
     
  6. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    Very little fuel came out of banjo bolt.
    Here's what I got now...
    Replaced injector lines, two high pressure supply lines with new TSB. Replaced hp valve in pump, two stage valve in pump. Totaling $771... Externally primed four gallons through the primer port, and proceeded to hand pump 300pumps with the hand pump.
    Results????
    -- dead battery, broken external primer pump, and an engine that didn't even try to hiccup for a start up....

    I'm at a complete loss.. does anybody know a clever way to burn this &#@_er down to claim insurance and not get caught???
     
  7. nasriza

    nasriza Road Train Member

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    Chicago, IL
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    rubbing alcohol goes a long way,( thats all i can suggest to your question )the only thing you got left and i hate to say this is actually injectors i've seen about 5 cascadias do the same #### so far 2 of them at fuel islands just shut off and no start
     
  8. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    Really? Thats interesting. They they throw codes?
     
  9. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    But all six go bad? I mean, even if there were two functioning injectors, I would at least suspect a hiccup during starting up. Or rough idle.
     
  10. mhyn

    mhyn Road Train Member

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    Men stop buying unnecessarily parts. Save your money. To start that german #### you must have proper fuel pressure in fuel rail while cranking by starter. I am saying again. Prime fuel system as much as possible, hook up DL. Crank the engine and monitor the pressure in fuel rail. That value you can find in diagnostic instrumentation section or Fuel system pressures section of DL. write down max value you see and tell it us.
     
    RocketyMan Thanks this.
  11. Codynidaho

    Codynidaho Light Load Member

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    Apr 8, 2016
    Cheyenne, Wyoming
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    I hear you. And I'm definitely done spending money. I was talking to another tech who said he uses a ecos priming system to prime systems that have been taken apart. I did research and learned that it takes at least 87lbs just to open up the two stage valve and allow fuel to flow into the rest of the system and not just back into the tank.

    I no longer have the dlink. It'll cost me $400 to have a guy come over with the laptop.... No joke. Minimum two hour charge plus 120 just to hook up computer. It's ridiculous. So tomorrow, I'm gonna be on the hunt for someone who has either a ecos or davco priming tool that can pressurise my system better than my weed killer spray bottle... Lol if whoever has the priming tool also has the dlink, then of course I'll monitor my pressures and let you know.
     
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