When I filled the gas tank on my 2008 Grand Marquis, the fuel gauge did not show it was full. When driving, the fuel gauge slowly raise the reading of the fuel until it showed full. Any ideas why?

Asked by Jun 10, 2016 at 06:31 PM about the 2008 Mercury Grand Marquis GS

Question type: Maintenance & Repair

2 Answers

Rephrased...any ideas why it didn't register full immediately?

222,635

The fuel level sensor/float in the fuel tank is probably faulty and needs replacing.

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