Auto ECU swap myths and faq's:
This throws the check engine light. SMOG PEOPLE BE AWARE!
1. The car will run the same2. 95 ecu will work in any s143. 96-up will only work in 96-up4. Removes speed governor5. Higher rev limiter (7200rpm)
The effects1. Cold start, it idles at 1500 then drops to 700 like normal after a few minutes2. The idle raises when you have the clutch in and move the shifter3. Throws trans code4. 95 ecu in 96-up throws o2 sensor code(although it still runs fine)5. Slightly better fuel economy
found on this write up:
http://www.nicoclub.com/articles.php?id=363519