For a 1999 Ford Explorer , 5.0 liter V8 engine :
The spark plug firing order is ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )
The engine cylinder locations are numbered :
firewall
4 - 8
3 - 7
2 - 6
1 - 5
front of Ford Explorer ( V8 )
The towers on the ( 2 ) coil packs are numbered :
( 4 - 7 ) ( 3 - 5 )
( 8 - 2 ) ( 6 - 1 )
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The firing order for a 1995 Ford Explorer is 1, 4, 2, 5, 3, 6. The number one cylinder is on the front left as you face the car.
The firing order for a 1999 Ford Expedition will depend on the size of the motor it has. To find the right firing order for that vehicle, open the hood and note the information on the cross bar at the front of the engine.
coil---3---4 pack--2---6 plug---1---5
1-4-2-5-3-6 Click the link for a diagram.
Need year and engine size in order to provide an answer.
Click the link for Taurus / Sable firing orders:
Ford 5.4L Firing order; 1-3-7-2-6-5-4-8
1 - 4 - 2 - 5 - 3 - 6
V6 is 1-4-2-5-3-6 V8 is 1-3-7-2-6-5-4-8
My Haynes repair manual shows the firing order for a Ford 4.0 L OHV engine as 1-4-2-5-3-6
1-4-2-5-3-6