Mitsubishi Eclipse catalytic converter deterioration causing loud scraping noise on Mitsubishi Eclipse

Some Mitsubishi Eclipse owners report experiencing loud scraping noises that may indicate issues with the catalytic converter, often resembling rusted rotors scraping against brake pads. This noise can stem from the warping of the lip on the backing plate due to external pressure, such as rust. Additionally, a failing catalytic converter can lead to exhaust leaks, resulting in unusual sounds like hissing or popping, particularly during acceleration. Owners are advised to thoroughly examine the exhaust system for visible damage, such as cracks or looseness in heat shields, as these can contribute to the noise. Unusual sounds from the exhaust may also signal problems that could affect engine performance and emissions. If experiencing such noises, it is recommended that owners have their Mitsubishi Eclipse inspected by a qualified mechanic to accurately diagnose and resolve the issue.