What would make a 1995 Chevy Corsica run rough?

A 1995 Chevy Corsica could run rough due to several factors, including a faulty ignition system, such as worn spark plugs or a failing ignition coil. Additionally, issues with the fuel system, like a clogged fuel filter or a malfunctioning fuel pump, can disrupt proper fuel delivery. Problems with the air intake, such as a dirty air filter or a malfunctioning mass airflow sensor, can also contribute to rough running. Lastly, engine vacuum leaks or sensor malfunctions, like those of the throttle position sensor, can affect engine performance.