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On the way home from watching Tyson change my shift bushings (thanks Tyson), my car stumbled. A few times. Especially when accelerating from lower rpms. Scared me.
got home and looked at the OXS duty cycle which was very high. 58. I remembered tyson saying, earlier today, that in this situation the OXS system goes 'closed loop' or something. Anyway, apparently the OXS quits corecting the mixture under full load, and my mixture (58) was too (lean/rich) (shoudl be 45), so it stumbled. The rest of the time the OXS system was correcting the mixture, or at least trying.
I don't know why the mixture changed so much. But the adjustment returned much of the good performance I thought was missing.
As for the OXS, apparently your car will run fine without it as long as your mixture is set right. I leave mine plugged in. The correct the mixture and I'm not sure they run better without them, though some say they do.
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'83 SC
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