need some input on gas gauge readings please

Discussion in 'Electrical Systems' started by buildinmy73, Apr 14, 2016.

  1. buildinmy73

    buildinmy73 Veteran Member

    994
    5
    Oct 20, 2007
    Bernardston, MA
    ok so i'm using a VDO sender in my ricks tank part number 226008 which says it's o ohm empty and 90 ohm full .
    my gauge is a autometer 3613 fuel gauge electric.short sweep 0-90 ohm

    i put five gal in it the other day to try and get it running for first time and gauge read a little past 1/2 tank.

    tank is a ricks stainless tank (I believe 18 gal) i bought used.
    i pulled connector off s terminal on gauge and it read 48 ohm at the wire
    I wish i checked sender before i put tank in but prev owner says it worked fine . i did check the part number on sender and is as described above (0-90ohm)
    any ideas on what else i could check >? or is pulling sender to verify it indeed is as part number states a 0-90 ohm .?
    thanks DAN
     
    Last edited: Apr 14, 2016
  2. djkaplan

    djkaplan Veteran Member

    157
    0
    Mar 27, 2016
    Victoria, bc
    I know basically nothing about the topic but could it be that its not calibrated for a 18 gal tank? The sender thinking its a 10 could explain the reading if that's how it works?
     
  3. Twisted_Metal

    Twisted_Metal Moderator Staff Member Lifetime Gold Member

    25,302
    290
    Feb 26, 2004
    Bloomington, MN
    A measured 48 Ohms on the circuit and reading just over half indicates it IS a 0-90 Ohm gauge.

    The reason your sending unit thinks it's above full seems to point to a sending unit problem.
    A poor ground connection could raise the resistance (and indicated fuel level) of the circuit but I think the likely culprit is a sending unit which is faulty (arm hanging up) or incorrect for the application (sits too deep in the tank).
     
  4. buildinmy73

    buildinmy73 Veteran Member

    994
    5
    Oct 20, 2007
    Bernardston, MA
    great reading THANK YOU
     
  5. grzewnicki

    grzewnicki Veteran Member Lifetime Gold Member

    you are welcome, I end up posting that link a few times a year.
     

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