94-96 G20 ECU the same?

[S13_fastback]

I need to purchase an OBD2 USDM G20 ecu, and I was told 94-96 was OBD2. I always thought OBD2 started in 1996? I also looked on car-part.com and it shows that the 1996 ECU is different. I just want to clarify it so I don't end up buying the wrong ECU. I am going to get it chipped and installed on my u13 bluebird motor in my 99 P11. I am using the USDM SR20DE wiring harness. Thanks guys

[markbuts3]

OBD was from 1994 and fully compliant.

http://www.g20.net/forum/showpost.php?p=544019&postcount=28

[S13_fastback]

OBD was from 1994 and fully compliant.

http://www.g20.net/forum/showpost.php?p=544019&postcount=28

According to the ECU Identifier on JWT's website, it shows that some 1994 ECUs are not OBD2

http://www.jimwolftechnology.com/tech_details.asp

If it starts with A11 then it's OBD1, A18 is OBD2

[ZoliElo]

I believe that is the 93.5 that they are counting as 94.

[S13_fastback]

I believe that is the 93.5 that they are counting as 94.

ZoliElo can you explain what is a 93.5? Are those sold as 1994 G20s or 1993 but with the changes of the 1994?

[ZoliElo]

They are sold as 94 I believe but have a mix of the refresh changes. People more in the know then I, can fill in the exact details - sorry...