I would suggest first checking out the 02 sensors before going any further. Especially on the side with the hotter catalytic. Is the cat. Glowing red or orange? An oxygen sensor failure can lead to incorrect readings of exhaust gasses. The faulty sensor can cause a too-rich or too-lean condition. Too rich and the catalyst can melt down. Too lean and the converter is unable to convert the hydrocarbons into safe elements and may not pass a state inspection. If O2 sensor failed then it probably has damaged the converter as well.
Let me know how the sensors test out and I will follow up.
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Friday, February 6th, 2009 AT 12:21 AM