1-6-5-4-3-2
Check firing order
For a 1990 Buick Century V6 3.3L engine, the manufacturer's recommended spark plug gap is .060" (1.52mm)
On a fuel injected Buick you must remove the fuel tank in order to access the fuel pump.
The firing order for the 1990 Buick Reatta, which is equipped with a 3.8L V6 engine, is 1-6-5-4-3-2. The spark plugs are typically arranged in a way that aligns with this firing sequence to ensure proper engine performance. It's essential to follow this order when replacing spark plugs or performing ignition system maintenance to avoid engine misfires.
buick firing order3.8 electra
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.
What is the firing order on a 1988 Buick Century.
1993 buick 3.8 firing order
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
1-3-5 front 2-4-6 back
1-6-5-4-3-2
It is important to know the firing order of a cars engine. The firing order of a Buick regal is 1-4-5-2-3-6.