On a 1996 Mustang with a 3.8 , the fuel filter is located just above the rearend assy on the body of the car. Obviously safety first, jack the vehicle and make sure its secure and blocked making it unable to roll away to prevent being crushed. You'll need atleast a short flathead screwdriver to remove the old filter and if you can, use safety goggles to keep dirt and possibly fuel out of your eyes would be a plus. On both the inlet and outlet fuel lines on the filter there is a plastic clip that has to be removed first, becareful not to break them as in some cases they may not be included with the new fuel filter. Once the clips are removed the lines should come off fairly easy with some slight prying or wiggling (DO NOT DAMAGE THE LINE CONNECTORS !!) Also, becareful of fuel spray because there is pressure in the lines, as some of us may already know there can be a little to ALOT of pressure and having fuel washed eyes is no fun, have a pan or something around to help catch the dripping fuel. After the lines are removed there is a large clamp wrapped around the filter, loosen it up and slide the filter out of the retaining bracket, it will slide out only one way , you may have a fuel line in the way keeping you from removing to filter and if that is the case, #1 you can either unbolt the bracket to help lower it enough to remove the filter or #2 simply pull down on the bracket to bend it slightly downward so that removal is easy. Remember which way the filter came out so that you don't put the new filter on backwards, fuel flow travels only one way so, if you put it on backwards the car will not run or if it does it won't run well at all. To reinstall just reverse the process. Good Luck.
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