Oldsmobile 88 rough idle and sputtering on acceleration possibly due to catalytic converter or intake gasket issues on Oldsmobile 88

Some Oldsmobile 88 owners report experiencing rough idle and sputtering during acceleration, which may be attributed to issues such as vacuum leaks and intake gasket problems. These vacuum leaks can disrupt the air-fuel balance in the engine, leading to poor combustion and misfires that cause sputtering. Additionally, problems with the intake gasket, including cracked PCV hoses or head gasket leaks, can also result in a rough idle. While catalytic converter issues are less likely to directly cause these symptoms, they may contribute to reduced power and fuel efficiency. Owners have noted that rough idling can manifest as engine misfiring, stalls when stopping, slow acceleration, or irregular idling, indicating potential underlying problems like a failing ignition system or clogged fuel injectors. It is crucial for owners to promptly diagnose and address these issues to prevent more severe complications with their vehicle.