Exhaust fumes

[GFO4501]

Thanks. To begin with, it had an O2 sensor code (13?) and the vss code. I replaced the O2 sensor and was able to clear that one. Still had fumes and the vss code. Then the idle air control valve ruptured on the water side and I plugged the coolant line. I have just recently replaced it. They must have a little gold in them somewhere 'cause that's a high dollar part! Replacing it seemed to help the running part but the fumes were still there. Maybe if I put a cat back on it and put the new top on it will be tolerable. The engine light works but I don't have any code now (fingers crossed). Greg