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need advice with fuel gage on 1955-1956 plymouth/dodge
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jerrybev
Posted 2021-12-07 12:46 PM (#617445)
Subject: need advice with fuel gage on 1955-1956 plymouth/dodge


Elite Veteran

Posts: 655
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Location: Winston Salem, N.C.
hi
I have a 1956 plymouth station wagon with fuel gage inaccurate readings. I replaced the existing fuel gage and fuel tank sending unit with NOS but it shows tank empty when there was still several gallons in the tank.

Next, I replaced both with a modern fuel gage mounted under the dash and modern fuel tank sending unit. This new equipment gives less accurate fuel than did the nos parts I removed. I did notice the fuel tank sending unit rod is about 1/3 as long as the nos one. what to do ?
Thanks for your time, advise, and help.
Merry Christmas
Jerry Whitfield
winston salem NC
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56D500boy
Posted 2021-12-07 1:54 PM (#617446 - in reply to #617445)
Subject: RE: need advice with fuel gage on 1955-1956 plymouth/dodge



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Posts: 8128
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Location: Lower Mainland BC
jerrybev - 2021-12-07 9:46 AM I have a 1956 plymouth station wagon with fuel gage inaccurate readings. I replaced the existing fuel gage and fuel tank sending unit with NOS but it shows tank empty when there was still several gallons in the tank.


Jerry: I think this has been an on-going problem for you for sometime. (Sorry to hear that it wasn't resolved).

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=68275&...

The 55-56 Plymouth wagon fuel gauge and fuel level sender need to be a matched pair.

As suggested previously, the proper 56 Plymouth wagon sender is 1641 679.



The gauge is also unique in that it uses a different system than the sedan gauges. There are three wires at the wagon gauge instead of 2 for the sedan gauge and two wires to the sender instead of one
for the sedan. The correct PN for the gauge is 1622 622. Maybe your's was wired up incorrectly? There is wiring and trouble-shooting info below:











Edited by 56D500boy 2021-12-07 2:00 PM




(55-56SuburbanFuelTankSender1641679.jpg)



(55-56FuelGaugePNs.jpg)



(55-56FuelGaugeOperation_ThermostaticWagonGauge.jpg)



(55-56FuelGaugeTroubleShootingList.jpg)



(55-56FuelGaugeTroubleShooting_Details.jpg)



Attachments
----------------
Attachments 55-56SuburbanFuelTankSender1641679.jpg (157KB - 18 downloads)
Attachments 55-56FuelGaugePNs.jpg (180KB - 18 downloads)
Attachments 55-56FuelGaugeOperation_ThermostaticWagonGauge.jpg (180KB - 18 downloads)
Attachments 55-56FuelGaugeTroubleShootingList.jpg (83KB - 19 downloads)
Attachments 55-56FuelGaugeTroubleShooting_Details.jpg (178KB - 17 downloads)
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local2Ed
Posted 2021-12-07 2:57 PM (#617447 - in reply to #617445)
Subject: RE: need advice with fuel gage on 1955-1956 plymouth/dodge


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Posts: 513
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jerrybev - 2021-12-07 12:46 PM

hi
I have a 1956 plymouth station wagon with fuel gage inaccurate readings. I replaced the existing fuel gage and fuel tank sending unit with NOS but it shows tank empty when there was still several gallons in the tank.



You won't run out of gas that way.

I'd call it good.
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ronbo97
Posted 2021-12-07 4:45 PM (#617453 - in reply to #617447)
Subject: RE: need advice with fuel gage on 1955-1956 plymouth/dodge


Expert

Posts: 3736
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Location: Connecticut

Jerry -

Do you still have the original fuel gauge ? If so, rebuild it. Then calibrate it.

Ron

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