negative first as that kills the positive. The computer will retain it's tune, but will lose all the short/long term trims, etc., so it will re-learn the tune as you drive it again. Totally normal and you'll likely never even notice anything.
Do not disconnect right before a smog, or if you do drive at least 75-100 miles with varied driving parameters or more so the computer re-learns and resets codes.
Jody
|