Did this groove last night but could not post results untill now. Groove took longer than expected. Seems like Throttle Body material was resisting the cut. I did this groove as a favor for a friend that had a bad experience with HHO. Anyway, here's the results:
HC 172 ppm
NOx 1 ppm
Vehicle has 156,314 miles. Test was done at normal op temp. - don't have an exact reading. Outside temp. was about 50 degrees F
HC 34 ppm
NOx 0 ppm
These readings were before capping off PCV, as I did not have right size cap. Anyways, I'll also log this in to MOD Report.