Most gasoline cars, hybrids, and many diesel vehicles on U.S. roads have some form of catalytic exhaust treatment. A battery-electric vehicle does not need a catalytic converter because it has no internal-combustion engine or tailpipe exhaust. Older vehicles built before converters became common are another possible exception. Vehicle age gives a useful first clue. The…
A stopped-up catalytic converter can make a vehicle feel weak, sluggish, and unable to breathe at higher engine speeds. Common signs include poor acceleration, loss of power, limited RPM, rough idle, hard starting, stalling, excess exhaust heat, and sometimes misfires. Severe blockage can eventually make the engine difficult or impossible to run. The problem develops…
Yes. A clogged catalytic converter can cause a major loss of engine power because exhaust gases cannot leave the engine freely. As backpressure builds, the cylinders struggle to clear burned gases and take in a fresh charge. The vehicle may accelerate slowly, feel weak on hills, hesitate, or refuse to reach normal RPM. A slight…