Why is the car running rough 2002 Buick century?

A 2002 Buick Century may run rough due to several potential issues, including a malfunctioning ignition system (such as worn spark plugs or faulty ignition coils), a clogged fuel filter, or problems with the fuel injectors. Additionally, vacuum leaks, a dirty mass airflow sensor, or issues with the engine's sensors can also contribute to rough engine performance. It's essential to perform a diagnostic check to identify the specific cause. Regular maintenance can help prevent these issues.