There is no such part.
There is no such part that I am aware of.
If you mean the fuel level sensor it's in the fuel tank.
In the fuel tank
You need to drain and remove the fuel tank to access the fuel pump on this vehicle.
20 U.S. gallons ( 75.7 liters )
the knock sensor monitors preignition,spark knock and sends signal to pcm,pcm responds by adjusting ignition timing and fuel timing until knock is gone.
What is the fuel tank capacity of a 1997 Mercury Villager van?
" regular " unleaded , 87 octane ( according to the Owner Guide )
Under the vehicle roughly in the middle, driver's side.
At the top of the driver's side kick panel.
If you mean the reset button on top of the FUEL PUMP SHUT OFF SWITCH the switch is located in the drivers footwell , behind the kick panel , by your left foot ( there is an access hole ) on a 2000 Mercury Villager
In the fuel tank.