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Q:

gas gauge on 1990 Ford F-350

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
When using my front tank my gas gauge does not always work, just ussually when i fill it up. If i turn the truck off and turn it back on it will no longer work. When i use the back tank the gauge works fine
(1) Answer
Sounds like the fuel level sensor in the front tank is bad.