NEED THE DIAGRAM ANS INSTRUCTION FOR FIRING ORDER FOR A 99 ARUROA

Firing order is 1,8,4,3,6,5,7,2

For 1999 Buick Regal 3.8 liter V-6 VIN "K" check this diagram...



Hope this helps (remembe to rate and comment this answer).

FIRING ORDERS

Before carrying out extensive tests to isolate poor running problems, check connections of spark plug wires. This is especially important if plugs, wires, distributor, etc., have been disturbed recently for service. Obviously, this is not applicable to the wireless 4.7L engine.

NOTE To avoid problems, remove and tag the spark plug wires one at a time to ease reinstallation.
For vehicles with an extensive service history, keep in mind that the distributor could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason, it is very important that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired.

Fig. 2.5L Engine Firing Order: 1-3-4-2 Distributor Rotation: Clockwise

Fig. 3.9L Engine Firing Order: 1-6-5-4-3-2 Distributor Rotation: Clockwise

Fig. 5.2L and 5.9L Engines Firing Order: 1-8-4-3-6-5-7-2 Distributor rotation: Clockwise

Fig. 4.7L Engine Firing Order: 1-8-4-3-6-5-7-2 Distributorless Ignition

Fig. 8.0L Engine Firing Order: 1-10-9-4-3-6-5-8-7-2- Distributorless Ignition
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FIRING ORDERS NOTE: To avoid confusion, remove and tag the spark plug wires one at a time, for replacement. If a distributor is not keyed for installation with only one orientation, it could have been removed previously and rewired. The resultant wiring would hold the correct firing order, but could change the relative placement of the plug towers in relation to the engine. For this reason it is imperative that you label all wires before disconnecting any of them. Also, before removal, compare the current wiring with the accompanying illustrations. If the current wiring does not match, make notes in your book to reflect how your engine is wired. Fig. 1: 1991-94 2.9L and 3.0L Engines Firing order: 1-4-2-5-3-6 Distributor rotation: Clockwise
Fig. 2: 2.3L, 2.5L Engines Firing order: 1-3-4-2 Distributorless ignition
Fig. 3: 1995-99 3.0L Engines Firing order: 1-4-2-5-3-6 Distributorless ignition
Fig. 4: 4.0L Engines Firing order: 1-4-2-5-3-6 Distributorless ignition
Fig. 5: 1996-99 5.0L Engines Firing order: 1-3-7-2-6-5-4-8 Distributorless ignition

the firing order is 5-2-3-6-4-1, 1-3-5 is in front, 2-4-6 is in back at firewall. for a 3.4,

i was try to send a diagram to you but having computer problems,even better go to this website it will show you a diagram, i know the firing order is 1342. go to www.autozone.com. hope this helps.

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Here u go.

Firing Order 153624 Clockwise rotation #1 Piston is First Front of engine #1 on Distrib Cap is at 9 Oclock #6 is at 3Oclock Notes Firing Order L6

1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
4.0L Engines Firing Order: 1-4-2-5-3-6 DIS Ignition System