sorry, no diagrahm but it is located on the passenger side near the fuel tank. You will need to jack up or put the car on a lift to access it. It is behind a plastic cover. I believe it has 8mm or 10mm heads on the bolts. They are plastic clips? that retain the lines to the filter, you should get new ones with the new filter. The lines are under high pressure so be careful of fuel spray when removing them. You've got the right information for fuel injected engine. For carburated engine there is a screw in filter located on the carburator, take the air cleaner off. some models have a secondary filter located in the fuel supply line in the lower engine compartment area. For injected engines you also have filter screens as part of the injector - these can't be serviced - the whole unit needs to be replaced. Watch for that high pressure line. You can relieve the pressure but that's a whole operation by itself I just go with the first answer you got and duck!
In the trunk
how do you change a water pump on 1993 Mercury Cougar
A 1993 Mercury Cougar takes ( DOT 3 brake fliud )
where the upper rad hose meets the engine
on the bottom of the rad on the passenger side
What type of freon does a 1993 cougar use
embedded with alternator
Left of stearing wheel, under the dash (get ready for some strange angles!).
the orignial price was $17,890
.040 ========================================================== According to one of Fords websites : For a 1993 Mercury Cougar : The 3.8 liter V6 engine and the 5.0 , V8 have spark plugs gapped at : ( .054 inch )
A button inside the glove box.