I had my oxygen sensors unplugged for two years and ran that way for two years and got 23 mpg city and 27 hwy (turbo).
Would running rich for two years kill my car and or o2 sensors ?
WHen i plugged my o2 sensors back in recently with a new chip, my MPG is very low (16ish) and my idle is a little rough. I have a A/f gauge tapped to the signal wire of the o2 sensor. Could this be causing an issue.
I have no cel and no codes in my car. What do you think could be causing my bad MPG?
Modified by lroy12 at 2:19 PM 8-2-2008