1. Engine Misfires: A clogged or damaged catalytic converter can restrict the flow of exhaust gases, causing the engine to misfire. Misfires occur when the fuel-air mixture in the engine's cylinders doesn't burn properly, resulting in rough engine operation and shaking.
2. Reduced Engine Performance: A faulty catalytic converter can also lead to reduced engine performance. The catalytic converter is responsible for converting harmful pollutants in the exhaust into less harmful substances. When it's not functioning properly, the engine may not be able to produce its full power, causing the car to feel sluggish and less responsive.
3. Shaking During Acceleration: If the catalytic converter is severely clogged, it can cause the car to shake or vibrate noticeably during acceleration. This happens because the restricted exhaust flow creates backpressure in the engine, which can lead to engine knocking or pinging.
4. Loud Exhaust Noises: A bad catalytic converter can also cause the exhaust to sound louder than usual. This is because the catalytic converter normally helps to muffle the sound of the exhaust, so when it's damaged or clogged, the exhaust may sound raspy or hollow.
5. Check Engine Light: When the catalytic converter fails or isn't functioning properly, it can trigger the Check Engine Light on your dashboard. This light is a warning indicator that there's an issue with the emissions control system, which includes the catalytic converter.
It's important to note that other exhaust problems can also cause similar symptoms, so it's best to have the vehicle diagnosed by a qualified mechanic to determine the exact cause of the shaking and exhaust issues.