Quote:
Originally Posted by brucey
It might also be a bad 02 sensor (150K and original) or my catalytic converter (Always had the P0420 code) but neither of those are a biggy since my state doesn't require emissions.
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A bad O2 sensor can ruin your fuel economy by making the ECU act as though you are running too lean hence causing it to richen the mix. And a bad cat can increase backpressure and cause the engine to work too hard to breathe. I wouldn't dismiss either one.