smoking probs

ok heres what people are saying it is about 8 months ago i cleared out my cadiledic converter or how ever u spell it and i still had stock exhaust well wen i stuck a strait through muffler on there i started smokin not really when im drivin but when i was in park and just stoped at a light or somin when i start goin a little bit of smoke comes out but then it just gos away so what do yall think is the verdict

i gutted my cat with a steel pipe and installed a cherry bomb exhaust at the same time , and it does appear to emmit a little bit of white smoke when the engine is cold but really , i wouldnt worry about it