Quote:
Originally Posted by eatsleepboost
On my normal tune I told them to not turn off my post cat monitoring as I will most likely be using a HFC. They stated there is a good chance I will still need to flash to the emission tune tune to pass but I did not. I checked my rediness before I went for sticker and all were ready. MA allows only 1 not ready as well.
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I am curious then if you swap back to catless X-pipe, with your normal tune that ESS left the 2 post cat O2 sensors 'on', did you ever get any fault codes or check engine light?