Firing orde ford 6 cyl f-150 truck distributer to spark plugs

3.9L V6 engine firing order is 1-6-5-4-3-2, cylinders on the pass side front to back are 2-4-6, cylinders on the driver side front to back are 1-3-5.

Codes say Cylinder 4, 5 & 6 are not firing. This could be a spark issue or a fuel issue or a mechanical engine failure. Is compression zero? Did they use a compression tester?

Hi, the firing order is ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )

The distributor rotor turns COUNTERCLOCKWISE
The marked # 1 position on the distributor cap faces to the REAR and slightly towards the drivers side, the engine cylinders spark plug locations are numbered.





The wiring diagram....

1-5-3-6-2-4 is the spark plug firing order for the 4.9 L ( 300 cubic inch ) straight 6

The distributor rotor turns CLOCKWISE

The marked # 1 position on the distributor cap is installed facing away from the engine

Hope this helps

Hello kat801931,

The firing order is:

1 5 3 6 2 4

Below is a picture of the cylinder order and the distributor. Number 1 cylinder is at the "white" location on the distributor. Good luck.



Regards,
netvan

The firing order is ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )

The distributor rotor turns COUNTERCLOCKWISE

The marked # 1 position on the distrubutor cap faces to the REAR and slightly towards the drivers side

The engine cylinders / spark plug locations are numbered :

firewall

4 - 8

3 - 7

2 - 6

1 - 5

front

If someone has altered the disstributer, pull #1 plug, put finger over hole, turn engine over until compression on that cyl, line up timing marks (ball park only) and rotor will be pointing at the correct terminal for #1 cylinder plug wire connection, in the cap.

1 - 5 - 4 - 2 - 6 - 3 - 7 - 8

The distributor rotor turns COUNTERCLOCKWISE

The marked # 1 position on the distributor cap faces to the rear and slightly towards the drivers side of the engine

The engine cylinders / spark plugs are numbered : passenger side , front to rear , 1 , 2 , 3 , 4 and drivers side , front to rear 5 , 6 , 7 , 8

V8 engines as follows:

289,302,5.0L(Carb.)
390,406,427,428
400,460

(cyl numbers)

Front (engine)
5 1
6 2
7 3
8 4
(firing order)
1-5-4-2-6-3-7-8


5.0L EFI
351, 5.4L, 5.8L

(cyl numbers)

Front (engine)
5 1
6 2
7 3
8 4
(firing order)
1-3-7-2-6-5-4-8

Hope this helps, let me know.

4 cyl = 1, 3, 4, 2

6 Cyl = 1, 2, 3, 4, 5, 6

The firing order is 153624

There is a diagram at this link:

http://www.mre-books.com/shopmanuals/firingorder.html