How to Change a Fuel Filter on a 2002 Ford Explorer | It Remove the gas cap from your Ford Explorer and locate the Schrader valve attached to the vehicle's fuel line. Don eye protection and depress the Schrader valve until no more gas and air comes out. Locate the fuel filter. Your fuel filter will be located underneath the edge of Signs of a bad fuel filter in a 2002 explorer? - Answers Signs of a bad fuel filter in a 2002 explorer? I believe the fuel filter on your 2 door Ford Explorer is underneath the Explorer , below the drivers door , mounted in the frame rail .