Hehe, I just cracked myself up. Referring to devices that reduce emissions as 'foul' is quite ironic.

Thank you, that helps quite a bit. Makes sense that more advanced computer controls can make the engine burn cleaner. Glad they didn't have to resort to stupidity (I had my car with the exhaust half disassembled for over 2 weeks trying to remove one of the 3 catalytic converters they put in there, only to have an oil feed line to my turbo tear).