faulty catalytic converter symptoms
Rattling noises are another symptom of a bad or failing catalytic converter. If a catalytic converter becomes old or damaged internally from excessively rich fuel mixtures, the catalyst coated honeycombs on the inside of the converter can collapse or break apart causing a rattle.
There are a handful of telltale signs your catalytic converter is on the fritz. Faulty catalytic converters will often give you acceleration troubles. You step on the gas and all you feel is a jerky, inconsistent response. This is caused by a buildup of backpressure because of blockage in your exhaust. When air canât escape, fresh air canât come in. An effective way to test for a blocked or plugged catalytic converter is with a vacuum gauge. By connecting the gauge to an intake vacuum on your intake manifold, throttle body, or carburetor, and recording your reading at idle, you can watch the needle as you rev the engine to increased rpm.