Trying to get a car to pass emissions and the guy suspects the O2 sensor is a bit lazy as there is too much CO in the exhaust at idle. Everything else passes fine other than that. I just did a full tune up and replaced plugs, rotor & cap, timing belt, water pump, etc. One other item to note, there is an aftermarket universal cat in the exhaust system that may or may not be large enough to do the job, but the previous owner passed the test so I don't think that is the issue. So if you have a known good / new three wire O2 sensor you would like to sell PM me. Thanks!
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