What are the symptoms of a clogged automotive three-way catalytic converter?
2 Answers
Automotive three-way catalytic converter clogging symptoms include: 1. Reduced vehicle acceleration with difficulty increasing engine RPM and speed; 2. Automatic transmission vehicles frequently force downshifts; 3. Decreased engine power and excessive exhaust emissions; 4. Engine shaking, malfunction indicator light illumination, and frequent stalling; 5. Continuous temperature rise in the exhaust pipe, potentially reaching adjacent components' ignition point and causing spontaneous combustion. Solutions for a clogged automotive three-way catalytic converter: 1. Remove the catalytic converter and soak/clean it with oxalic acid or toilet cleaner; 2. Replace the three-way catalytic converter; 3. Add gasoline additives while avoiding inferior quality gasoline and fuel additives.
While driving, I noticed a significant drop in the car's power. The acceleration felt sluggish, especially when climbing hills—the RPM just wouldn't go up, as if the car hadn't 'eaten.' Fuel consumption suddenly increased; previously, a full tank could last 500 kilometers, but now it's gone in less than 400. The exhaust made gurgling sounds and emitted a sour smell, and the idle was unstable with severe engine vibration. Later, the check engine light came on, and the diagnosis revealed a clogged catalytic converter. If not repaired promptly, the blocked exhaust can cause the engine to overheat and, in severe cases, damage the cylinders, leading to costly repairs. So, I recommend not waiting until major problems arise—get it checked and cleaned at a professional shop early on.
