Quote:
Originally Posted by 97-civic-ex
... the HX also has lean burn, but from what I read the Cali version ECU will not go into lean burn as much as Fed version due to the cali smog requirements.
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"As much as" is interesting to me. Do you mean that the Cali HX engines/ECU were set up for a "lean burn light"? Is that what you read? I know from I think MetroMPG that the gen 1 Insight had lean brn even in Cali (got a ULEV rating in fact). So maybe the HX improved on the VX lean burn somehow, sorta on the way to where they got the Gen1 Insight?