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PCA Member since 1988
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,616
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He says the lambda is unplugged. With lambda working, that should correct for changes in AFR between idle and WOT and the switches should cause enrichment at WOT. Without, it's back to an open loop system. But, as both of you noted, it doesn't have the vacuum signal like 1973-79 and RoW cars do.
Does the OXS box have any effect on enrichment at WOT or idle when the lambda is unplugged? I don't have that system, so I don't know if it still provides enrichment, or is completely disabled.
From his description of the AFR behavior, it sounds like it is full open loop, and there is no WOT enrichment going on. This could be due to the switches not providing the signal to the OXS, or because the OXS is not operating.
Damon, is the OXS system still connected to power? Fuse still in place? Do you know what part number is on the WUR?
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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!
Last edited by PeteKz; 07-13-2023 at 06:20 PM..
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