so I've been happily squirting for a few years now
the wideband sensor I bought from euro car parts did not work, equivalent part number sure, but no good.
i bought one in an innovate bag and it works good, just hooked up my wideband again so I can check out my tuning and see how things are
wouldnt pass mot last year on emissions so we had to use another vehicle, but the point is I'm interested to see what my current CO is and at what AFR, I am tuned to 13.5:1 at idle, im going to play around with dropping the ego control to 500rpm rather than the original 1100 to see if it will tighten up the emissions for the sake of a slightly more lopey idle
anyway the real reason for posting was I was picking up lambda earth on the spare socket on my relay board which would normally be used for fast idle valve, and during installing my wideband last night and Calibrating the heater I noticed I lost or perhaps even had no earth from the get go
after some head scratching I found a burnt link on the relay board
super easy to get around the problem, but just thought I would mention it so that folks don't make the same mistake in future!