Wired up my URD O2 simulator tonight. First thought, my truck idles better. Lower and smoother. Went for a short drive, maybe it's placebo but it seems much snappier. Quieter until I open her up, smoother, peppier when I step in it, and less smell. (it was running really rich) tomorrow will tell if my mpg are better and how the power is as I have a 250 mile trip down the expressway.
Sent from the drivers seat of my 05 4runner.
I didn't read your entire thread so I apologize in advance. Are you fighting a P0420/P0430 code and that's why the URD 02 sim was needed?