Can you start a 1998 ford expedit6ion without chiped key?

No, you can't reliably start a 1998 Ford Expedition without the chipped key. The 1998 model year used a Passive Anti-Theft System (PATS), which requires the transponder chip embedded in the key to be recognized by the vehicle's computer before it will allow the engine to crank. Without the correct chip, the system will prevent the engine from starting. There are methods to bypass the PATS system, but they are usually illegal and technically challenging, requiring specialized tools and knowledge.