Im glad you figured this out and could put it behind you. Yes a lot was learned and next issue you have a better idea on how it works so resolving it will be easier.
Study hard for your test!!! :-/
Wish i could tell why your pic doesn't load? Are you on the web page or an app? I-phone or android?
Never look down on anyone unless you are helping them up - Jesse Jackson
TODAY IS THE DAY IT PASSED ITS TEST, FINALLY.
It took a lot of getting there with a lot of false starts on the way. The printout on the emissions test said 0% CO and 1.007% Lambda. They seemed very happy with that.
The biggest lesson learnt is that a catalyst does not last forever. I totally missed that one and changed virtually everything else, probably unnecessarily.
I still have to find out why the ECU is not energising the aux. fan relay. I now have a manual switch. Any suggestions on that would be welcome.
Re the missing pictures. I am on Windows on the website on a laptop. It used to work, then something changed.
Thanks everybody for all the suggestions. Your help is appreciated. I shall be raising a glass of vino later.
Best regards from Spain. Mike