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Re: O2 sensor questions keep or remove
What engine and year are you working on? If you swap O2 banks, it will wreak havoc on your swap! I talked to.a.guy that bought a high dollar harness that the O2s were swapped and it took a long time to figure out why it ran so bad/ rich. The O2s were telling the PCM thatit was lean so it dumped more fuel but the problem is it was using the opposite bank of injectors.
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