![]() In most cases, a failing catalytic converter will also trigger the Check Engine light. Other symptoms include a significant drop in gas mileage and an increase in exhaust fumes.Ī failing muffler should be repaired or replaced immediately as an exhaust system that is not working properly can lead to additional damage to the engine or catalytic converter.įailing Catalytic Converter: The catalytic converter is a key component of the exhaust system and if it is failing the engine will be louder than normal, will run rough and the smell of rotten eggs will be coming from the exhaust. ![]() A car that is running louder than normal is often due to a failing muffler. Eventually it will start to fail completely. Over time a muffler will rust and develop holes and cracks. Failing Muffler: Mufflers are constantly exposed to heat and pressure not to mention road salts, grime and the weather.Service type Engine is running louder than normal Inspection
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