1998 Ford Taurus Owner Guide 1st Printing - Page 157

Maintenance and care 2. Carefully turn the filler cap counterclockwise 1/8 of a turn until it stops. 3. Pull to remove the cap from the fuel filler pipe. 4. To install the cap, align the tabs on the cap with the notches on the filler pipe. 5. Turn the filler cap clockwise 1/8 of a turn until it stops. If the "Service Engine Soon/Check Engine " indicator comes on and stays on when you start the engine, the fuel filler cap may not be properly installed. Turn off the engine, remove the fuel filler cap and reinstall it being careful to align the cap properly. If you must replace the fuel filler cap, replace it with an authorized Motorcraft part. The customer warranty may be void for any damage to the fuel tank or fuel system if an authorized Motorcraft fuel filler cap is not used. The fuel system may be under pressure. If the fuel filler cap is venting vapor or if you hear a hissing sound, wait until it stops before completely removing the fuel filler cap. Otherwise, fuel may spray out and injure you or others. If you do not use the proper fuel filler cap, the pressure in the fuel tank can damage the fuel system or cause it to work improperly in a collision. 157