> What puzzles me is how does one get an electronically managed FI system to
> operate in other than a default mode without the OXS?

        The system never runs in a closed loop mode. My bmw K75S
motorcycle uses a motronic brain w/o o2 sensor.... The ecu
just runs directly off the data maps without feedback from the
system. This means things like intake leaks are dying fuel pressure
regulators are not going to be corrected for. But then, exhaust leaks
are not going to screw up the system either...

dave