I recently started to experience the fuel gauge needle swinging down below the R mark and then back to its current reading. This only occurs when the fuel level gets near or below half a tank. Any help would be greatly appreciated.

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Eric
'88 300E
'00 Expedition
'86 Alfa Romeo Spider
'84 Harley Davidson FLH"X"
Special Edition
'70 FJ40 Land Cruiser (basket case)