ImperialCrown· Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
It sounds like there is a bad spot in the fuel level sender resistor element. Sometimes the contact wiper wears and lifts off from the resistance element. Gently bending it back against the element may fix the dead spot. The level sensor kit can be replaced separately if needed.