Anybody??? Since my last post (beginning to think it's an exercise in futility here) I have found out the catalytic converter is original to the car (225k miles on that), the plugs are just about new (last 500 miles or so). The car supposedly ran perfectly from the time the motor was swapped (3 yrs ago) until about March when the CEL started coming on. The guy says he had it ck'd and was told it was the O2 sensor. That's brand new now.