what the year and model of the buick?
1992 I dont know the model, he didnt tell me.
Ok, here is firing order for all 1992 Buick 3.8L engines:
Identifying Ignition Types I and II
On Type I coil packs, three twin tower ignition coils are combined into a single coil pack unit.
On Type II coil packs, the coils can be replaced separately and the ignition wires are all on the same side of the coil pack.
With Type I Ignition
With Type II Ignition