I squirted brake cleaner into the fuel feed pipe on the vaporiser. I also used a air line too. Considering that the fuel vaporiser has only been on the car for other a year the nut was tight as fook and wouldn't come out. So when I did my tests I just felt for the air blowing through the exhaust pipe. I will try another static regen using my tester and see if it will get rid of the soot.