1986 Buick Electra no spark

I would use a spark checker, they are available at your local parts store, remove the wire from the sparkplug insert spark checker, then attach to metal(exhaust bolt, manifold)have a helper crank engine, watch for spark or listen for snapping sound, if no spark found at any wires, you'll need to scan computer for crank signal/camsignal, it may be a good idea to check for injector pulse at this time also. Good Luck, Lou