I believe this relates to the coilpack and cylinder firing orders...
See "Related Questions" below
Here is the number three coil pack located?
There isn't one. All 2003 Ford Taurus use a coil pack under the control of the Powertrain Control Module instead of a distributor.
coil----3---4 pack---2---6 plug----1---5
On a 2003 Explorer, there is no distributor or coil pack. Each spark plug has it's own coil pack as part of the spark plug boot.
f150 ignition coil sequence
coil---3---4 pack--2---6 plug---1---5
On a Ford 4.0 liter V6 engine ( SOHC and OHV versions ) The 6 coil pack towers are numbered : coil-----3 - 4 pack----2 - 6 plug-----1 - 5 ( I believe there are stickers on the coil pack showing the tower numbers ) ---------------------------------------------------------------------------- Also , the engine cylinder locations are numbered : firewall 3 - 6 2 - 5 1 - 4 Front of Ford Explorer Sport Trac , 4.0 litre , SOHC , V6 engine
coil----3---4 pack---2---6 plug----1---5
1-----2-----3 4-----5-----6 front of Ford Escape ( with V6 engine )
coil----3---4 pack---2---6 plug----1---5
On a 2003 Ford Expedition : It has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
coil---3---4 pack--2---6 plug---1---5