Under the vehicle, approximately in the middle, driver's side.
The filter is located behind the RH side of the carbon canister under the hood.
A Villager, like most cars, has only one fuel filter.
The Villager does not have a test port. You need to tee into the line at the fuel filter.
The fuel filter is located under the hood on the drivers side beneath the master cylinder
20 gallons. http://consumerguideauto.howstuffworks.com/2001-mercury-villager-3.htm a simple Google search yields amazing results!
The fuel pump is mounted on top and inside the fuel tank.
Really? Unclip the cover and remove the old filter. It's easy.
The Villager does not have a test port, you need to tee into the line near the fuel filter to test pressure.
On a 2001 Mercury Mountaineer : The fuel filter is under the vehicle , below the drivers door , mounted on the frame rail
According to fordparts.com : For a 1995 Mercury Villager : Engine oil filter ( Motorcraft FL - 839 ) Engine air filter ( Motorcraft FA - 1121 ) Engine fuel filter ( Motorcraft FG - 978 )
Under the vehicle roughly in the middle, driver's side.
A screwdriver and a 10mm socket wrench.