Quote:
Originally Posted by California98Civic
The Federal VX (for united states not named California) had a 4 wire ECU, I believe, and a different ECU because lean burn boosts NOX emissions and Cali would not allow that, IIRC what others here have taught me.
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I thought it was the opposite. CA spec had the 4 wire and the other 49 states (federal) had the 5 wire. There are many writeups on how to swap these to 5 wire though.