Going from passenger side to driver the plug in the back would be the the first. Count back to front on the passenger side and front to back on the driver side. Example 1 8 2 7 3 6 4 5
Passenger side , 3rd plug from the front
The recommended spark plug gap for a 2003 Ford Expedition 4.6 is .054"
On a Ford Expedition ( the # 1 engine cylinder / spark plug is on the passenger side ) firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Check under the hood decal info.
The spark plug gap for a 2005 Hyundai Accent, according to spark plug manufacturers, is .044" (1.11mm)
In a 2002 Ford Expedition : ( No , not really ) both the 4.6 and the 5.4 have the Coil On Plug ( C.O.P. ) ignition system , but there is a connection between the individual coil and the spark plug
1,3,4,2
On a 1999 Ford Expedition , 5.4 firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle It has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils
what is the spark plug gap for 2005 gmc envoy 4.2l v6
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
third plug back on the drivers side
One at a time