Thanks guys, great information, not worried about radio suppression so will leave as is.

Here is a partial scan of the installation document for the radio receiver FDR 18805-E for 56 Ford
There are several condensers used for noise suppression even a spring to insert inside the dust caps for the front wheels
marv
marv

I just reviewed a 1954 Ford Radio Owner's Manual and it contains a Parts List. Included in the Parts List is "FDA-18871-A" described as "Condenser Assy.-Radio (Fuel Gage)". This is proof that the condenser on the fuel gauge sender is for radio suppression not needle stability. Alan S. Freeman

I agree with Alan. The capacitors were for radio noise suppression. The would also be located on the generator. You wouldn't have them on a radio delete car. The design of the sending unit and the gauge were so to prevent rapid fluctuations due to the gas moving during driving.

Jeff Petersen

I think it's purpose was to stop needle movement when turning corners and such. Kept needle readings more stable.

I am pretty sure that it is only there for radio interference and that the sender will work properly without it. Alan S. Freeman

Does anyone know the value of the capacitor mounted to the original fuel gauge sending unit on a 1955 crown vic?