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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,638
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Do you have both the OXS ECU and the gauge hooked up to the same O2 sensor, or separate sensors? If separate, you may be getting different readings on one bank of cylinders versus the other bank, due to uneven fuel distribution, or intake leaks, or exhaust gasket leaks.
I would also put a digital voltmeter on the output of the O2 sensor to see whether your gauge is calibrated. At Lambda=1, it should be about .45 volts.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.
Cars are for driving. If you want art, get something you can hang on the wall!
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