[QUOTE=Had the same problem. Added 1 quart of Marvel Mystery Oil to a full tank and the problem is gone. Your results may vary but it doesn't hurt to try.[/QUOTE]

Seems Marvel.Mystery oil cleaned out the sender unit! .
Shortly after replacing my sender unit i got a flickering needle . I suspect the cleaning additive added to the fuel coated the sender unit , removed and cleaned the delicate resistance wires in the sender gauge and back to a steady needle again.
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