I too have had reoccuring problems with my left fuel guage, and noticed something a few weeks ago when working on a fuel leak caused by a dried cork . If I played with the wires that go between the outboard sensor, and the inboard, it caused the fuel guage to spike, and at times work. This even if I isolated (taped down) the connections that went through the tank caps.
I now beleive that I may have a crack in the wire itself. Why else when I move them around while isolating the connections, should I get what amounts to different impendence or continuity .
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