Under the car
On my 1988 Crown Vic, The fuel filter was located on the passenger side, right in front of the rear tire, tucked up on the frame but the models of the '85 and '88 crown vic are different. but i hope this helps you.
In the fuel tank
you have to drop the fuel tank. the pump is inside.
in the rear of the car but under it and its on the side driver side
How to change. Fuel pump on 200 crown vic
check underneath your driver seat or left passenger seat
Replace spark plugs air/fuel filter pcv valve
Bad fuel pump? Plugged fuel, air filter? Plugged catalytic converter?
Under hood, center, upper engine area, front of carburetor, mounted in fuel line
Impossible to predict. I can tell you that neglecting to replace the fuel filter on a regular basis will shorten the life of the fuel pump. A partially clogged fuel filter causes the pump to work harder.
In the fuel tank. ================================== * if it has an ELECTRIC fuel pump
Have to remove the fuel rail's to get to them.