They wouldn't put catalytic converters on the cars if they weren't needed. CO is a result of incomplete combustion. The job of the catalytic converter is to momentarily store unburned oxygen, then mix it with unburned fuel, so it can be burned internally. It does that about two times per second. With no converter, the unburned fuel goes out the tail pipe, partly as carbon monoxide.
Tuesday, February 28th, 2017 AT 4:03 PM