I had the battery disconnected when I did some work on the Vibe last year (the list included replacing the timing chain tensioner.) I have to say it kinda scared me with how rough it ran at first, my mind instantly went to somehow I managed to knock the timing off on the thing. Then I thought about the relearn...
03 Vibe base. Born 10/14/2002 06:07 AM
Neptune. Auto, Moon & Tunes, power package. 129k mi.
'13 Sonic LT - 1.4L ECOTEC turbo/6A. 84k mi.
'15 Escape SE - 1.6L EcoBoost, FWD. 41k mi. (hers)