Great feedback one and all. Thank You.
I am going to attempt to re-map my digital wurs control pressure and warm up rate first, and then do some re-testing.
In the meantime, all of the talk about the closed loop readings and the factors affecting it, has got me re-assessing my 02 sensor connector, the lead running back to the harness, and any shielding issues I might have.
I have attached a couple of photos of the "current" situation (apologies). One photo shows the state of affairs with the connector and harness lead before I attempted to address it. The harness lead (damaged area) was being chaffed over a long period of time due to it's contact with another harness. It looks to me that the outer cover and the mesh shielding under it has been compromised, but the wires under them are still insulated and intact. I was thinking of trimming away the rough stuff and wrapping the area with a shield of some sort ?
The connector itself had only a few strands of copper wire left attached (via solder) to the connector pin, which was exposed and connected to the sensor black wire socket (I pulled it off for the photo).
The other picture shows what I had hoped would be at least a connector repair ?
I broke away more of the (by now pretty brittle) connector housing/mounting cover to expose more of the green wire and its copper wire. Since it was still difficult to work in that space, I butt spliced (crimped) a small piece of similar gauge speaker wire to the green wire and shrink wrapped it. I then soldered the other end to the original connector pin, shrink wrapped and electrical taped it. This is where the sensor lead attaches now (until I am sure it works).
I have read discussions of the importance of proper shielding and also some about "breathing" sensor leads, so my confidence in the connector fix as well as the connectors harness lead damage, has me a bit doubtful about whether the sensors signal is actually making it back to the ECU accurately.
