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Thread: Fuel Sending Unit Problem

  1. #1
    Member
    Join Date
    Mar 2018
    Location
    Bradenton, Florida
    Posts
    58
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    Fuel Sending Unit Problem

    I have a 2018 33 kit with a Coyote.
    Car runs great but I have never gotten the fuel gauge calibrated properly.
    I have the Autometer gauges. 16-158 ohm range
    It shows full when full but then goes to 1/2 tank quickly, sometimes empty, then half again, i don't know.
    I even added a autometer fuel bridge to manually calibrate it and add a low fuel warning light but that didn't work either, still erratic.
    I've checked my grounds, all connections soldered.
    When I test it I get 142.6 ohms full and 16.7 ohms empty.
    I've included a pic of a similar sending unit I found online.
    Problem is I have body on and don't want to take it off, but I have not done body work yet so one option is to cut an access hole on rear deck to relace sending unit and then repair it during body work.

    On a side note when I am below 1/2 tank and take a hard right turn the engine will hickup for fuel, has anyone experienced this?

    Any help is appreciated! Thank you.TN1-1500-x-1500.jpg

  2. #2
    Senior Member
    Join Date
    Nov 2017
    Location
    Placitas, NM
    Posts
    1,479
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    Dan,
    That sending unit looks like the one FFR sent me when I got their newer tank, the one that has the filler cap inside the trunk.
    I don’t have any problems with the engine cutting out however when the fuel gauge gets almost to E I’m out of gas.
    I’ll look into that Autometer fuel bridge.
    You shouldn’t need to completely remove the body, remove all of the mounting bolts, pick up the back end about 2 feet and support it.
    That should give you enough clearance to get the sender out.
    If your fuel gauge is jumping around that much either the sending unit is bad or you have a bad connection somewhere, could even be a bad fuel gauge too.

    Just found the pic of what I’m using.

    443886A2-2D71-40A4-A655-6AB1685134C0.jpeg
    Last edited by JimLev; 01-31-2024 at 04:11 PM. Reason: Added more and pic
    '33 Hotrod, #1047 Gen 1, delivered on 2/27/18, go cart on 9/24/18.
    LS3 w/Gearstar Level 3 4L65e Tranny, Yank converter, Lokar shifter, Electric PS, Vintage AC/Heat/Def, 8.8" 3.55
    TorqThrust II Wheels w/Toyo Proxy T1 Sport Tires, F 235/45ZR17 R 295/35ZR18
    Garage Built, Driveway Painted.

  3. #3
    Junior Member
    Join Date
    Jun 2022
    Location
    Chantilly, VA
    Posts
    12
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    Dan, sent a PM. Had a few questions regarding the sending unit pictured in your post.

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