How to drain out old fuel?

2004 MERCURY GRAND MARQUIS
149,000 MILES • 2WD • AUTOMATIC
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JBANKS82X
  • MEMBER
  • 4 POSTS
Trying car been sitting for 6 years Trying to drain out gas.
Jun 13, 2023 at 10:46 AM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,236 POSTS
Hi,

You can do this in a couple of ways. First, you can disconnect the fuel supply at the fuel rail and allow the pump to empty the tank, or you can remove the tank, fuel pump, and then empty it there. Or you could do the same at the fuel filter, which needs to be replaced as well. See pic below.

There isn't a drain for the tank. Once it is empty, I would blow compressed air through the fuel lines and rail to clear out any old fuel.

The fuel filter is on the left side frame rail. See pic 1 below. It should be replaced.

Let me know if you have questions or if this helps.

Take care,

Joe

See pic below Note: If it has been sitting for six years, it may be a good idea to just remove the fuel tank and clean it out as well.



Jun 13, 2023 at 2:56 PM
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