Can a bad exhaust cause rough idling? Find out in this article as we explore the connection between a faulty exhaust system and rough idling, along with the potential effects it can have on your vehicle’s performance. Discover how a bad exhaust system can lead to decreased engine performance, increased emissions, excessive engine noise, and reduced fuel efficiency. Learn about the possible causes of rough idling, such as inaccurate sensor readings, impaired exhaust gas recirculation, and issues in the air-fuel mixture. Troubleshoot a bad exhaust system and identify signs that indicate a problem, including unusual engine noise, decreased performance, check engine lights, and irregular idling. Understand the main components of the exhaust system that impact idling, such as the muffler, exhaust manifold, catalytic converter, and oxygen sensors. Finally, explore how a damaged muffler can lead to rough idling and how to identify signs of a damaged muffler.