|
Well, a catalytic converters job is to cut down on harmful emissions in your exhaust gasses. Theres nothing mechanical about it. It's purely a chemical reaction. I'm not an expert on this but I think the byproduct of a properly functioning catalytic converter when it mixes with exhaust gasses is Oxygen and water. Hence the O2 sensors before and after your cats. These compare how well your cat is functioning. My guess would be that back when you had the missing and backfiring going on that you damaged one of the cats. Maybe from some unburned fuel getting into the cat and ruining it? I know when one of mine went bad, I had a similar problem with very bad misfiring and sputtering right before I started getting the codes.
|