Fuel is not traveling between tanks

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by JohnSmith69, Nov 16, 2020.

  1. CropShop

    CropShop Bobtail Member

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    Mar 24, 2020
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    Had a 2011 T800 with that problem. Ended up replacing the return splitter/tee, and blowing out the breather tubes. Seems to have taken care of the problem. On KW the suction is a regular tee, and the return is the special one. I think it cost around $30 and several hours to do. It was a real pain because it is up under cab above trans and hard to reach. $1000 seems kind of high.
     
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  3. MTN Boomer

    MTN Boomer Heavy Load Member

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    Both Detroits had that issue. Blowing the fuel line out helps, however. U
    You also have the fuel return lines ,, if 1 is plugged all the fuel will go to one tank. I had shutoff valves installed in the fuel lines so I run off 1 tank.
     
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  4. JohnSmith69

    JohnSmith69 Bobtail Member

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    Feb 23, 2020
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    You guys are ####in awesome thank you so much
     
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  5. Bernard D

    Bernard D Light Load Member

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    Jun 27, 2020
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    sometines bugs crawl in vent libes and pkug it up .
    loosen up fuel caps ans see if tanjs will kwvel.
    if not it your cross over valve between tanks in middke under cab follow libes
     
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  6. flood

    flood Road Train Member

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    Also and I hope its not but on some older trucks (over 6 years, over 800,000 miles) the rubber fuel lines will swell on the inside and restrict the flow.
     
  7. Peter_Bilt

    Peter_Bilt Light Load Member

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    Feb 18, 2017
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    Don’t get screwed like I did.
     
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  8. JohnSmith69

    JohnSmith69 Bobtail Member

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    Feb 23, 2020
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    What happened to you?
     
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