Well, failed again. NOx better, 7.3 / 6 instead of 8.5/6 and the graph is no longer pinning the top of the chart. It's possible on the first test it was way worse and they just couldn't measure it :/

Next step is get the EGR system to work. Should have done that in the first place. Hopefully I can resurrect that valve. I do not want to pay $175 for a new one...