I've been told that some 98's were equipped with a Passive AntiTheft System which requires any new keys to be programmed, sorta like programming a new remote button. How can you tell if your vehicle has the PATS system? I got only one key with my used Explorer. The black plastic head is marked FORD in an oval and there is an "S" stamped on the key shank. It sounds like it's going to be expensive to get a second one made. If you already have 2 working keys, you can program another one by yourself, but with only one key, it looks like I'm hosed!
Any other options? Thanks! RED