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Q:

fuel guage is dropped to empty on 2005 Mercury Mountaineer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
2005 mountaineer service engine has stayed along with the fuel gauge dropping to empty
(1) Answer
going to want to check the fuel level sensor in the tank, possible that the entire fuel pump assembly will need to be replaced to service this part.