Not by back passanger side tire. In front of the gas tank behind a heat shield.
On a 2001 Mercury Mountaineer : The fuel filter is under the vehicle , below the drivers door , mounted on the frame rail
On a 2001 Mercury Mountaineer : Underneath the Mountaineer , below the drivers door , mounted on the frame rail
It has a vacuum leak somewhere.
take it off
Find the filter which is under the car, There are special tools required which are cheap at the parts store. They should show you how to use them/
On a 1997 Mercury Mountaineer : I assume the fuel filter would be in the same location as a 1997 Ford Explorer : ( underneath the Mountaineer , below the drivers door , mounted on the frame rail )
Its inside the gas tank. connected to the bottom of the fuel pump.
The fuel pump is inside the gas tank you have to drop the tank to get it out
There are several things that can cause your 2000 Mercury Mountaineer from running. The most common cause is a lack of fuel. You might want to start by changing your fuel filter.
below the drivers door , mounted on the frame rail for the body
On a 2004 Mercury Mountaineer : The ELECTRIC fuel pump is INSIDE the gas tank
where is the fuel pump shutoff switch for a 1996 mercury mountaineer