I wish I had saved the name of who provided detailed steps for testing the gas gauge. Thank you anyways. I only had to try the first 2 steps to determine I had a leaking float. When I pulled the sender from the tank gas started leaking out of the float. Must say this was an irritation/surprise as I bought a brand new replacement sender with float 10 years ago. Never expected it to start leaking. Thanks to the group.
Dave, do the search and find the sending unit recommended by Jon G on ebay. It's the most accurate one you can get and is only about $30 or so.
1939 Packard Standard Eight Coupe (The Phantom) 1950 Chevrolet 3100 (Ol' Roy) 1956 Cadillac Coupe de Ville (The Bismarck) 1966 Oldsmobile Toronado (The Purple Knif) 1966 Ford Mustang (Little Red) 1964 Ford Galaxie 500 coupe 1979 Ford F-100 1976 Ford F-150 (Big Red) 1995 Ford F-150 (Newt)