Anybody ever heard of a smoking catalytic converter? After a drive I had smoke coming out of my vent in front of the trunk. At first I thought it was oil from the valve cover dripping on the exhaust but its not. When I jacked the car it looked like the smoke was coming from the lower converter??? No oil on it or anything..... just smoke. Maybe degreaser caught in the clam shell around the converter from cleaning?? Any ideas?