What I can say is buy a cheapo scan tool and red the codes. Post all codes here and I can better guess what's going on, but, at over 100,000 miles, the O2 sensors are at the end of their designed lifespan.
If a converter did melt, O2's MUST be replaced, any unburned gas that snuck thru the cats has probably finished off the sensors. But at this point, you do need to look at both cats, or read the stored codes.
Wednesday, March 31st, 2010 AT 12:48 PM