Originally Posted by SonicYelloWRX
It all depends on the state. Some states testing machines cannot read the JDM ECU. When I was in RI their machines were able to read my ecu and it was fine. When I moved to CT the testing machines could not read my ECU at all. So they did a sniffer. I passed the sniffer test catless(just barely iwas like 217/220, only 3 points from failing). If you can do a tailpipe test it will actually be easier for you to pass than an OBDII test.
now I'm very curious if the ones in Illinois can read the JDM ECU or not. sinc I've been pondering putting a 207 in my car once I get it paid off. OR I'll just have to move to a different part of Illinois that doesn't do emissions