I need to remove the fuel filterbut dont know how

The check engine light is an early warning system to protect your engine from malfunction. There are several sensors within your engine that trigger this light. If you have your owners manual there will be a section in it that tell you what to check. The basics are ;
engine oil level
coolant level
blocked air filter
but the list can go on so look at the manual.

need to replace the fuel filter on a 2003 ford expedition. Do not know the location of where it is at.

FIRST NEED TO RELIEF FUEL PRESSURE REMOVE GAS CAP RELIEF GAS PRESSURE IN FUEL TANK.THEN REMOVE FUEL PUMP RELAY THEN START ENGINE UNTIL IT DIES LACK OF FUEL,CRANK ENGINE OVER FEW MORE TIMES MAKE SURE FUEL OUT OF FUEL LINES. THEN YOU NEED TO REMOVE AIR CLEANER CROSS OVER TUBE ABOVE FUEL RAILS. DISCONNECT LINES AT THE ENDS OF THE FUELS RAILS ASSEMBLY. MARK AND DISCONNECT THE FUEL INJECTOR WIRE HARNESS CONNECTORS. REMOVE THE FUEL RAIL RETAINING BOLTS, DISCONNECT THE VACUUM LINE FROM THE FUEL PRESSURE REGULATOR. REMOVE THE FUEL RAIL ASSEMBLY FROM THE ENGINE. IF YOU HAVE AUTOMATIC TRANSMISSION REMOVE THE THROTTLE PRESSURE CABLE AND BRACKET TO REMOVE THE FUEL RAIL ASSEMBLY.TO REMOVE FUEL INJECTORS JUST REMOVE CLIPS THAT RETAIN FUEL INJECTORS IN FUEL RAIL. BESURE GO TO DEALERSHIP BUY NEW FUEL INJECTORS O - RINGS.APPLY A SMALL AMOUNT OF ENGINE OIL TO THE O - RINGS TO AID IN INSTALLATION. TORQUE FUEL RAIL BOLTS TO 100 INCH LBS.

to replace the fuel pump module.first you need to relieve the fuel system pressure.turn off radio first, then disconnect the negative battery cable.drain fuel from fuel tank.then then safely raise support car on jack stands. make sure sitting on solid level ground then remove the fuel charcoal canister hoses and vent line remove disconnect fuel pump. disconnect fuel pump electrical connector and remove fuel filler hose from fuel tank then remove the fuel tank from the vechicle.the heat shield and the rear exhaust system may have to be remove if you problem dropping the fuel tank.once fuel tank dropped you need snap ring pliers to remove the fuel pump module retaining ring.disconnect the fuel pump sending unit.disconnect the fuel pressure sensor and fuel pump module electrical connector .if you need help to replace the fuel level sending unit.you need a haynes repair manual.it has instruction how to remove and replace the fuel level sending unit.but most of the time the whole new fuel pump module come with new fuel level sending unit.if you are replacing fuel pump.when done put every thing back visa versa. be very careful working around gasoline and fuel tank.dont smoke.becareful dont make no sparks with wrenches when removing gas tank.wear safety glasses and have a helper at all times. dont work under vechicle by your self.

Check the idle air control valve. It might be faulty.

I have had a similar problem, when the wire from the coil to the cap worked it out from the coil just enough to lose contact. It stayed on the coil but the inner wire was out just far enough and looked normal. If your plugs are fouled the air flow sensor may be failing as well. I would clean the outer sensor screen well with a good solvent that leaves no residues and also check for good contact for the wire into the distributor cap.

the fuel filter should be where the fuel line enters the carb. Remove the fuel line from carb, then remove the part on the carb that the fuel line attaches to. remove the filter. There will be a spring behind the filter.

bs it is in the back under the seat dont comment if you dont know
remove four screws pop plate off and there it is it took me 25 mins to change fuel pump beat that

Just adding to the previous solution... When replacing the fuel pump, it make the job a lot easier to just pull the truck bed off. There are 6 bolts holding it on from underneath (also remove the gas cap screws) and it will lift off the frame. The bolts are very easy to reach with a 6 inch extension as long as you don't have duel exhaust in which case you will need a knuckle. Once the bed is off...you have free and easy access to the top of the fuel tank and pump. Use a brass punch to remove the retaining ring on top of the fuel tank. (a pump replacement kit can be rented at most auto parts stores).

Check under your rear seat. If you dont find it there it is Mounted in the the gastank. I would suggest you dont drop the tank and take it to a shop for them to do it. THere are special tools used to remove the gasoline in the tank and also remove the pup itself. If it is in the seat then disconnect the battery and its just a fuel bolts that you can remove. If you remove it make sure to cover the hole where your pump was . You dont want to ignite those Fumes in the sun.