Fuel toggle on 386

Discussion in 'Peterbilt Forum' started by 1988DRU, Oct 5, 2013.

  1. 1988DRU

    1988DRU Bobtail Member

    3
    1
    Feb 8, 2008
    Calgary, AB
    0
    Just picked up a 2008 386 with a cummins ISX. Noticed this fuel toggle on the dash and can't figure out what it is. The guys at the dealership didn't know either....any thoughts?
     

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  3. baha

    baha Road Train Member

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    Jul 25, 2013
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    r tank, L tank gauge
     
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  4. Ezrider_48501

    Ezrider_48501 Road Train Member

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    Apr 2, 2011
    bismarck, nd
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    baha is correct R-L fuel gauge one nice feature you see quite a bit on pete's and rarely ever any other trucks, not something your use often but its nice in a case were you might notice your fuel gauge rising or dropping faster than it should you can check to see that your tanks are pulling equally and a suction line plugged or something causing it to pump all your fuel to one side or the other.

    of course one truck i drove the right tank always read 1/4 tank less than the left tank even though they were in fact even.
     
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  5. 1988DRU

    1988DRU Bobtail Member

    3
    1
    Feb 8, 2008
    Calgary, AB
    0
    Thanks for the replies - makes sense now why when I played with it it didn't appear to do anything. Any idea which is which (up for right side, down for left)?
     
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  6. baha

    baha Road Train Member

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    next time U fuel start one 1st leave key on ck. on level after 30gal.
     
  7. bubbanbrenda

    bubbanbrenda Road Train Member

    1,388
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    Feb 27, 2011
    Middletown,Oh.
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    Pop off the fancy chrome ring and see if its labeled under there
     
  8. Gliderpilot

    Gliderpilot Bobtail Member

    32
    4
    Jun 13, 2013
    New Jersey
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    up is right tank down is left tank
     
  9. Flying Dutchman

    Flying Dutchman Road Train Member

    1,274
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    Nov 2, 2009
    Northern California
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    Peterbilt had these on our trucks up until 2004, nothing for 2005-08, then showed up again in our new 2014 trucks.....a monitor for each tank. We have 70 gallons on the driver side and 50 on the other. My right/passenger side gauge is the only one that works. When I flip the switch to the driver side tank it reads full all day long.
     
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