I am currently running e30 mix ethanol. I need to pass inspection which always hangs up on the o2 sensors. Can I return my tune back to stock and be able to pass? Or should I run all the E30 mix out, then set my tune back to stock?
Also, is there a certain amount of miles you have to drive before the 02 sensors read, if any?
Thanks for everyone's help.
Also, is there a certain amount of miles you have to drive before the 02 sensors read, if any?
Thanks for everyone's help.

