when the digital display shows me I have say 10 miles left to E, and we are all broke these days, so I put like $10 in gas in it & it doesn't "register" on the electronic gage however the E-F arm will move up a bit. Why doesn't it register?
Electric Gas Gage Reader Issues on 2005 Ford Taurus
poss fuel tank sending unit issues. have codes scanned and see if you have a code stating fuel tank sending unit error
IF you have the owners manual , it has an explanation in it for that response you describe. It is normal.