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Anyone installed AirDog Caterpillar Secondary Fuel System Upgrade Kit on 3406E or C15

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Slow302, Jun 16, 2020.

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  1. Jun 16, 2020 #1
    Slow302

    Slow302 Medium Load Member

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    Slow302, Jun 16, 2020
    Slow302, Jun 16, 2020
    #1
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  3. Jun 18, 2020 #2
    Slow302

    Slow302 Medium Load Member

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    Looks like i wont be doing this upgrade kit on my 3406E. Fuel feed routing is different than on C15. On C15 fuel gres from transfer pump to filter base than to front of head, on 3406E goes from transfer pump to filter base than goes to ECM than to front of head. AirDog says i have to put "T" in line between filter base and ECM and than run it to the head. To me ECM will never know 100% how much how fuel went to the head. I will just replace original lines with new one and maybe install AirDog Champ 2
     
    Slow302, Jun 18, 2020
    Slow302, Jun 18, 2020
    #2
  4. Jun 18, 2020 #3
    little cat 500

    little cat 500 Road Train Member

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    The ecm don't care how much fuel goes through it the fuel that does go though ecm is to cool it that it
     
    little cat 500, Jun 18, 2020
    little cat 500, Jun 18, 2020
    #3
  5. Jun 18, 2020 #4
    bigguns

    bigguns Road Train Member

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    Fuel doesn’t even need to go through the ecm.
     
    bigguns, Jun 18, 2020
    bigguns, Jun 18, 2020
    #4
    wore out Thanks this.
  7. Jun 18, 2020 #5
    little cat 500

    little cat 500 Road Train Member

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    it does on a 40 pin ecm may not have to but does
     
    little cat 500, Jun 18, 2020
    little cat 500, Jun 18, 2020
    #5
  8. Jun 18, 2020 #6
    bigguns

    bigguns Road Train Member

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    Why? How is the 40 pin ecm any different than the others?
     
    bigguns, Jun 18, 2020
    bigguns, Jun 18, 2020
    #6
  9. Jun 18, 2020 #7
    little cat 500

    little cat 500 Road Train Member

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    Abbottstown PA
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    early cat ecms were cooled by fuel I guess they ran to hot an burnt up
     
    little cat 500, Jun 18, 2020
    little cat 500, Jun 18, 2020
    #7
  10. Jun 18, 2020 #8
    little cat 500

    little cat 500 Road Train Member

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    Abbottstown PA
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    well the difference is in the two fuel fittings sticking out the side
     
    little cat 500, Jun 18, 2020
    little cat 500, Jun 18, 2020
    #8
  11. Jun 18, 2020 #9
    little cat 500

    little cat 500 Road Train Member

    2,044
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    Jan 17, 2010
    Abbottstown PA
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    same as a n14 there fuel runs through ecm
     
    little cat 500, Jun 18, 2020
    little cat 500, Jun 18, 2020
    #9
  12. Jun 19, 2020 #10
    bigguns

    bigguns Road Train Member

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    Fuel ran through early ecms because they thought it was necessary. Later on they quit it wasn’t needed.
    I don’t know how you would cool an ecm by running 180*+ fuel thru it.
     
    bigguns, Jun 19, 2020
    bigguns, Jun 19, 2020
    #10
    wore out Thanks this.
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