After tidying things up under car , i connected
The 02 sensor to sheetmetal under car.
Car ran like crap and had 3 hrs of diagnosing
and a plug change .
Factory 6 pin harness wasnt mating to 02 sensor
Im hoping the rest of the harness has integrity .
Lot of other troubleshooting horror stories on the net ..
so probably good practice to watch the crimps and
connections on the harnesses.