1986 Buick Riviera
3.8 liter V-6

• Carbureted:

• Fuel Injected:
  • 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.