California Will Start Testing for ECU Tunes During Smog Checks Starting Next Week
https://www.roadandtrack.com/news/a3...g-smog-checks/
How would the smog checks know if your ECU tune is stock?Quote:
Starting July 19, 2021, testing stations will begin to check whether cars are running OEM or California Air Resources Board (CARB)-approved tunes. If your car isn't, it'll fail the test.
Thanks,
Scott