1992 Buick Century

Is this an intermittent issue? Does the vehicle start and run? If the vehicle cranks good but won't start, have a helper crank it, while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Any applicable trouble codes? You should be able to check mil codes yourself. You have to do testing, when the problem occurs. Intermittent issues can be a pain.