If your talking about the ford fusion you don't have a number 7 plug because it only has six plugs.
#7 spark plug is the last plug on the left side...that is the drivers side of the truck
firewall 1-----2-----3-----4 5-----6-----7-----8 front of 1999 Lincoln Continental
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
drivers side of engine , 3rd spark plug / engine cylinder from front of engine The engine cylinders / spark plugs are numbered : passenger side , front to rear , 1 , 2 , 3 , 4 drivers side , front to rear , 5 , 6 , 7 , 8
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
It is the driver side rear cylinder.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Mustang ( V8 )
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
The # 1 spark plug / engine cylinder is on the passenger side of the engine , front cylinder The spark plugs / engine cylinders are numbered : passenger side - front to rear - 1 , 2 , 3 , 4 drivers side - front to rear - 5 , 6 , 7 , 8 The spark plug firing order for the 4.6 L and 5.4 L is ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )