The DATA-Link is located under the driver's side steering wheel just above the pedals. This DATA-Link is for you or the mechanic to hook up their portable computer and communicate with the vehicles computer to help them diagnose the vehicles problems.
Check link below for info.
how do you set or check the timing on a 99 ford expedition?
Change clock on 99 expedition
On a Ford Expedition : Bank 1 is the passenger side of the engine
Check Owners Manual. If you don't have one check the related link below. Check under Fuses
3
According to the 1999 Ford Expedition Owner Guide ( 5W-30 )
Replace the bad injector.
fuse box diagram for 99 expedition i don"t have a manuel
Check Fuses
Ford and Chevy parts will not interchange, SORRY
No , a 1999 Ford Expedition came from the factory with the 4.6 or 5.4 " regular " unleaded GASOLINE V8 engines ( * 87 octane )