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Super Moderator
2010 DTS
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89,124 Posts
Sounds like it is working correctly. It WILL show "F" Full until it get down to where it can get a reading. I think technically it is overfull.

You may have a bad tank baffle. With only 2 gallons, when you turn the gas sloshes away from the pump pick up and thus starves the engine. Why in the world would you run it that low anyway? Aside from playing it too close to the wire and potentially running out of gas, the fuel pump is cooled by the fuel. Keep it at or above 1/4 tank and you'll solve the problem and save the pump.
 
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