For those that followed my other post, this is a continuation of my 1940 Buick super. I grounded the gauge wire at the trunk connection and the gauge dropped to empty. Indicating the gauge and wiring was good. So, I started tackling my gas Gauge problem today. I dropped the tank and took out the sending unit. Much to my delight the tank and sending unit was changed some where along my cars life. The tank is super clean inside! Just like new. When I took out the sending unit, it had plastic washers under the 5 screws. Is that normal? Or should I replace them with metal washers?
anyway, I tested the old sending unit while I had it out, sure enough it’s bad. I got my new sending unit today, hooked it up outside the tank and the gauge works perfectly! Thanks again to everyone who helped me through this frustrating problem. I do plan on connecting a ground wire to one of the sending units screws, that’s why I’m confused about the plastic washers. Any thoughts?