1990 Oldsmobile Delta 88 how do I check ignition coil

With dis ignition, I wouldn't think all three coils would die at the same time? When the problem occurs, did you visually check for spark at the plugs? You can carry a known good spark plug or tester in your glove box. They won't get hot. Pull a plug wire place tester in boot, ground metal part of tester to metal part of engine, cranking, watch for spark. If you have spark everywhere, use a gage and check fuel pressure. Any applicable trouble codes?