1997 Ford Expedition Owner's Manual - Page 177

Maintenance and care Relearning idle conditions Because your vehicle's engine is electronically controlled by a computer, some control conditions are maintained by power from the battery. When the battery is disconnected or a new battery is installed, the computer must "relearn" its idle conditions before your vehicle will drive properly. To complete this process: 1. Put the gearshift in P(Park). 2. Turn off all accessories, and start the engine. 3. Let the engine idle for at least one minute. 4. The relearning process will automatically complete as you drive the vehicle. • If you do not allow the engine to relearn its idle, the idle quality of your vehicle may be adversely affected until the idle is eventually relearned. • If the battery has been disconnected or a new battery has been installed, the clock and preset radio stations must be reset once the battery is reconnected. • Always dispose of used automotive batteries in a responsible manner. Follow your community's standards for disposal. Call your local recycling center to find out more about recycling automotive batteries. 178