1-3-5 front 2-4-6 back
I'm not sure what the firing order for that vehicle is but try Autozone.com they are posting tech data on their web site now. If you plan on doing plugs and wires just do one at a time, then you should'nt need the firing order.
spark gap 1984 regal 3.8
Check firing order
The spark plug gap for a 2000 Buick Regal should be set at .060 inches. New spark plugs may be purchased at an auto parts store and will be preset.
For a 1990 Buick Century V6 3.3L engine, the manufacturer's recommended spark plug gap is .060" (1.52mm)
The Spark Plug Gap.060 (In thousandths of an inch)
1-6-5-4-3-2
The engine firing order is 123456. The spark plugs at the front of the car are starting from the passenger side 2 4 6 and at the windshield side 1 3 5. There is no distributor on a 1990 3.1 liter engine. They have a coil pack instead and are numbered 5 2 3 6 4 1 from the left. Original equipment from factory had the spark plug wires numbered. .helpwhats the firing order diagram 1984 buick regal
The spark plugs are all identical so are interchangeable
Spark plug diagram for '98 buck regal
3.8 liter V-6 : .060"
The coil packs are in the following order from top to bottom: 6,3,2,5,4,1. The firing order is 1,6,5,4,3,2 The cyl numbering is: 2----4----6 1----3----5