I need to know the firing order for a 1991 Chevrolet suburban. 1500 2wd. I need to check the wires going from the distributor cap to the spark plugs to see if they are correctly located. Before I changed the distributor, wires and sparkplugs the engine was missing but idled fine. Now it is idling ruff. Need to know information about distributor cap and were wires need to go to check problem.

If you can tell me what color the wire is I should be able to tell you where it goes.
But if you are getting spark from the coil tower the primary ignition system is working.
Have you checked the coil wire, and will it fire a plug ? The coil could be weak enough to fire a plug in open air but not in a cylinder under compression.
You do know for a fact the distributor rotor is turning, right ?

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.

check your firing order....most likely you crossed a spark plug wire or two.

Number 1 is at the 5 o'clock position. The firing order is 1-8-4-3-6-5-7-2. The distributor turns clockwise.

Fire order
1-3-4-2

Cylinder #1 will be the one closes to the fan belts and so on 1-2-3-4, on the distributor cap there should be a # 1 stamped on it, put cylinder # 1 spark plug wire on that one, install spark plug wire in firing order clockwise on the cap, the cap some time's might even have the firing order on it.

Hello, I have attached a figure to help you out. The point with out the black dot is Number one on the distributor. Hope this helps. Please rate.

Firing order is 1-8-4-3-6-5-7-2 and the rotor turns for clockwise. If you look at the distributor cap the Above

firing order 1342, distributor, clockwise rotation.

Its easy to set the distributor timming all you have to do is to aligne the crankshaft pully to the marks and see which cylinder is on firing or rather on power stroke you may hve to remove the vavle cover to get the correct cylinder at power stroke which will have the valves (inlet & exhaust )closed.
At the distributor cap removed check out the rotor as to where it is and thts your number one, since you know the firing order so from here you should be able to get the wiring of the distributor correct.
Good Luck.

It's gotta be 5.7 V-8 . As u stand in front of the suburban facing the front bumper, there are 4 spark plugs on each side of the engine. The front (of the engine) plug on the drivers side, is plug #1, the front plug on the pass. side is #2, then back to driver side, next plug back is #3, back to Pass side, next plug is #4 etc. to #8. The distributor cap (spark plug wires go from dist. cap (9 wires on top) to each spark plug, Extra wire goes to coil, which sends spark to all wires). The wires fire in the following order: 1, 8, 4, 3, 6, 5. 7, 2. You will have to find where the #1 spark plug goes in the distributor cap, some (hopefully yours ) have a #1 on the top next too where the wire plugs in to the cap. If u find this u r good to go! Put #1 wire in, using a pushing/twisting motion, the wires go in in a clockwise order from #1 as u look down on the distributor. Wires to spark plugs go on w/ same push/twist. You should hear/feel a slight click or snap (not always though!) if inserted all the way. Let me know if this is enough info, if not I'll try to give u more. If u can't find where #1 goes on the dist. cap, stand on the driver side of engine, I believe #1 is at approx. 8 oclock position on the dist cap. Good luck!