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Curious about the O2 sensor thing myself. On that link you posted, were those plug and play from that site? It's only the "Pre-Cat" that is usually needing replacement right?
I've had really bad hunting at idle (cold and warm), and have been chasing it for some time now (1128 and 1130 showing). New MAF recently. Checked for vacuum leaks as well, but never considered the O2 sensors. Could these be culprit for bad idling conditions?
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