Firing order for a 1980 Ford F-250 6.6 litter

this link has you info 3 8 V6 Ford firing order

Google it

1432 firing order

It can be faulty or dirty spark plug itselfd.Also for reference get the fuel level checked.Is the fuel tank is empty or near to empty.
Try cleaning the spark plugs and then see if that is helpin.On some cases the black carbon layer gets collected on the spark plugs and that causes the problem,so cleaning the plugs help.But if its not helping,then spark plug has to be replaced.Spark plugs get power from ignition coil to ignite sparks.If ignitioncoils are faulty then also there will no spark.--------------

To troubleshot and confirm the issue,i suggest you to go through the help links provided below,check the procedure and it will help you to confirm the issue in your case.
----------
Click the link below:------

Car cranks, has spark but will not ?

http://howtobyme.blogspot.com/2011/12/car-crankshas-spark-but-will-not-start.html

-----------

The spark plug firing order for car?

http://schematicsdiagram.blogspot.com/2011/06/spark-plug-firing-order-for-car.html

------------

How to Replace Spark Plugs?

http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-spark-plugs.html

---------------

How to Perform a Basic Engine Tune Up-Spark Plug and Wire Change

http://schematicsdiagram.blogspot.com/2011/08/how-to-perform-basic-engine-tune-up_01.html

----------

Car has no spark?

http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html

---------

How does the spark plug wire go on the distributor cap in 1991 Mitsubishi Mighty?

http://schematicsdiagram.blogspot.com/2011/12/how-does-spark-plug-wires-go-on.html

------------
No spark on 2008 Chevy Avalanche?

http://schematicsdiagram.blogspot.in/2012/04/no-spark-on-2008-chevy-avalanche.html

-----------

How does the spark plug wire go on the distributor cap in 1985 Pontiac sunbird?

http://schematicsdiagram.blogspot.com/2011/12/how-does-spark-plug-wire-go-on.html

--------------

Ford Plug Wires Not Coming out?

http://whoisbyme.blogspot.in/2012/06/ford-plug-wires-not-coming-out.html

--------

Ford explorer has no spark?

http://schematicsdiagram.blogspot.com/2011/12/ford-explorer-has-no-spark.html

----------

Chevy impala spark plug firing order diagrams?

http://technoanswers.blogspot.in/2012/02/chevy-impala-spark-plug-firing-order.html

------------

How to gap spark plug on Chevy Impala?

http://technoanswers.blogspot.in/2012/02/how-to-gap-spark-plug-on-chevy-impala.html

-----------

Spark plug Replacing for chevy impala?

http://technoanswers.blogspot.in/2012/02/spark-plug-replacing-for-chevy-impala.html

Chevy s-10 blazer 4.3l Spark Plug Firing Order?

http://howtobyme.blogspot.com/2011/12/chevy-s-10-blazer-43l-spark-plug-firing.html

----------------

1982 dodge rampage Spark plugs Firing Order Diagram?

http://schematicsdiagram.blogspot.com/2011/12/1982-dodge-rampage-spark-plug-firing.html

----------------

2006 Suzuki Forenza Spark plug Firing Order Diagram?

http://schematicsdiagram.blogspot.com/2011/12/2006-suzuki-forenza-spark-plug-firing.html

------------

1983 Ford Ranger Spark plug firing order?

http://schematicsdiagram.blogspot.com/2011/12/1983-ford-ranger-spark-plug-firing.html

--------

Firing Order for 1991 Lexus ES 250?

http://schematicsdiagram.blogspot.com/2011/12/firing-order-for-1991-lexus-es-250.html

----------------

Firing order for 1992 Chevrolet 5.0 engine?

http://schematicsdiagram.blogspot.com/2011/12/firing-order-for-1992-chevrolet-50.html

-----------

How to identify number one spark plug on the distributor cap?

http://schematicsdiagram.blogspot.com/2011/12/how-to-identify-number-one-spark-plug.html

-----------

How to remove rear spark plugs on 1991 Buick Regal?

http://howtobyme.blogspot.in/2012/02/how-to-remove-rear-spark-plugs-on-1991.html

---------------

These details will help.

Thanks.

6 and 8 cylinder:

http://autorepair.about.com/od/enginefiringorders1/Engine_Firing_Orders.htm

1980 Buick Century 3.8L 2BL OHV 6cylThe Firing Order:
Firing order 1-6-5-4-3-2 ------- front | 2 4 6 | of | |Distributor rotates clockwise vehicle | 1 3 5 | -------

Hope helps.

Not sure what you mean by 8-6-4 but this will help you. Pick the correct one for your application:



GM (Cadillac) 250 (4.1L) V8 .GM (Cadillac) 273 (4.5L) V8 .GM (Oldsmobile) 307 (5.0L) V8 .GM (Oldsmobile) 350 (5.7L) V8 w/EFI.Engine firing order: 1-8-4-3-6-5-7-2 .Distributor rotation: counterclockwise



GM (Cadillac) 368, 425, 472, 500 V8.Engine firing order: 1-5-6-3-4-2-7-8.Distributor rotation: clockwise




GM (Cadillac) 429 V8.Engine firing order: 1-8-7-2-6-5-4-3.Distributor rotation: clockwise

Fig. Fig. 5: 4.2L (255 cu. in.), 5.0 (302 cu.in.) except HO Engines. Engine Firing Order: 1-5-4-2-6-3-7-8. Distributor Rotation: Counterclockwise

Firing order 1-5-3-6-2-4 ------------- front | | of | 1 2 3 4 5 6 | vehicle | | Distributor rotates clockwise ------------