I need the firing order on for explorer 91 4.0

The firing order for 4.6L engine. 1 3 7 2 6 5 4 8
.

http://www.2carpros.com/questions/ford-explorer-1991-ford-explorer-firing-order-for-spark-plugs

There you go. firing order is 1, 4, 2, 5, 3, 6.

follow this link for various engine firing orders, as you never specified the engine designation ,some of these engines were used in the libero you will need to know the engine type to look up the right firing order
Repair Guides Firing Orders Firing Orders AutoZone com

there should be a sticker with the firing order on it under your hood. if not its on your intake

need wiring diagram for 1997 ford explorer

google "ford explorer firing order"

4.0L OHV Firing Order Firing order for the 4.0 liter OHV V6 is

• 1-4-2-5-3-6

http://autorepair.about.com/od/enginefiringorders1/ 4.0L SOHV Firing Order Firing order for the 4.0 liter SOHV V6 is

• 1-4-2-5-3-6

http://autorepair.about.com/od/enginefiringorders1/ 5.0L Firing Order Firing order for the 5.0 liter V8 is

• 1-3-7-2-6-5-4-8

http://autorepair.about.com/od/enginefiringorders1/ How to Find the Cylinder Order V6 When standing in the front of the vehicle the cylinders are numbered 1-3 up the passenger's side and 4-6 up the driver's side. How to Find the Cylinder Order V8 When standing in the front of the vehicle the cylinders are numbered 1-4 up the passenger's side and 5-8 up the driver's side.

For the 1991 Ford Explorer 4.0L SOHC V6:

Firing Order:
1-4-2-5-3-6

Cylinders:
...(back)
3...........6
2...........5
1...........4
...(front)

Coil Connections:
...(back)
1....2....3
5....6....4
..(front)

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

991 Chevy S10 firing order
The firing order for a Chevy s10 depends on which engine you have.
1.9L engine the firing order is: 1-3-4-2 . Distributor rotates counterclockwise.
2.0L engine the firing order is: 1-3-4-2 . Distributor rotates clockwise.
2.5L engine the firing order is: 1-3-4-2 . Distributor rotates clockwise.
2.8L engine the firing order is: 1-2-3-4-5-6 . Distributor rotates clockwise.
4.3L engine the firing order is: 1-6-5-4-3-2 . Distributor rotates clockwise.

lol the firing oder in that believe it or not is 1-2-3-4-5-6 all 3.1 haave the same firing order

that is true your firing order is wrong here is a link to a web sight that has all the 1998 explorers 6cyl just click on the one that your explorer is and it'll show you the correct firing order also make sure you have your plugs gaped right good luck.
http://autorepair.about.com/library/firing_orders/bl-ford-firing-98.htm