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Where is the gas filter location on a 1991 mercury grand marquis?

3 Answers

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  • 1 decade ago
    Favorite Answer

    Jack it up onto stands and look by the doors it should be by the rear doors.There is a special tool you should buy that will help you to remove the clips on it and be sure to change it once a yr afterwards.

    Hope that helps and best of luck.By the way it might help to either look in a Haynes service manual or buy one for that vehicle.

  • john r
    Lv 5
    1 decade ago

    under the driver back door, is under 45psi, so be carefull, DO NOT try to replace that filter, when the exhasut is hot.

    Source(s): the old master mechanic
  • 1 decade ago

    under the driver side seat...

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