Most modern vehicles have the fuel pump in the back or in most cases the fuel tank itself. If your check engine light comes on, take it in for a computer scan. Ask them to do a pressure test of the fuel pump also.
In a 1997 Mercury Mountaineer : ( 4R70W )
Disc brakes ( with small brake shoes in the back of the rotors for your parking / emergency brake )
I am pretty sure that it is non existent, i have a 99 mountaineer and it is AWD and i am going to assume that yours has either FWD or AWD which means it has a transmission and a transfer case not a transaxle
Look under truck at drivers side front between door and tire. If ya see the the front axle driveshaft andya have NO auto/4x4 hi/4x4 lo select switch above cigarette lighter then its AWD. i have a 2000 mercury mountaineer awd. Also the 5 liter v8 was awd.
I am getting a combined hwy/city average of 14mpg
The owner manual states, unless the diff has been submerged in water, it never needs to be changed.
On a 2007 Mercury Mountaineer : Open the drivers door and on the end of the door ( or the latch pillar ) you will see an information sticker that shows the original size tires on the vehicle from the factory
On a 2002 Mercury Mountaineer : The 4.6 liter V8 engine uses ( 2 timing CHAINS / 1 CHAIN to each cylinder head )
On a 2005 Mercury Mountaineer : All Wheel Drive ( AWD ) has engine power going to all 4 wheels , all the time , and doesn't require any driver input
It will usually tell you on the transmission's dip stick handle but I also have a98 Mountaineer AWD V-8 and it uses Mercon V
5 quarts ( 4.7 liters ) with engine oil filter change
I had the same problem with my 99 AWD mountaineer. I was told the front differential was bad.