On
GAGT everyone's talking about how BOSCH sensors are garbage and cause this kind of thing, but this problem existed before I replaced it, which leads me to believe it's not the O2 sensor itself, but some other physical problem such as the location.
From other automotive forums:
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Something everyone seems to overlook when talking about that rear O2 is that it DOES affect your fuel trim, aside from monitoring the converter.
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And the reason the measurement is inaccurate the farther you go away from the head on the upstream O2 is
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Further from the chamber, the reaction is more complete.
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This guy says the tune is made for the OEM O2 placement.
Should I put it in one runner (closest to OEM location) or in the collector (farther away but all runners' input)?