They don't convert to OBDII. OBD II is on board diagnositcs II. Its an emissions and engine monitoring/ control system.might be a noob question. search is down so i wanted to ask why do people convert to obdII???
some, or maybe even quite a few, people here do in fact convert to OBDII from OBD1.
The "reason" is that the specific Toyota tuning in the original OBD1 ECU's is of some concern to some people who believe that there is a lean a/f region in the midband rpm range where.