I took the smog pump and catalytic converter off my '89 Camaro that has a 305 engine in it with fuel injection. I did plug the holes on the hoses that were left after taking the pump off. Talking with people that had done this on their cars led me to believe there would be no negative effects, but shortly after that my car exhaust became very rich, emitting fumes like a 1950 log truck. The car has 92,000 miles, has been babied all its life and never even ran hard. It has smoked a little for years upon startup because of slightly leaking valve stem seals, but otherwise been problem free. Does anyone have a clue why this is happening or if it is indeed caused by my modifications? Could it be related to normal fuel injection problems at this mileage?