Quote:
Originally Posted by California98Civic
I think the Cali HX primary O2 sensor is not the wide band, 5 wire type. Without the wide band sensor, I don't think the ECU could do much... I think.
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On the VX that is true.
On the HX O2 sensors are the same for both cali and fed. Only ecu is different. Again, i did the research for my brother's 2000 HX that is currently running a fed ecu and nothing else is changed. And if you do a search you will find a member on this forum has done the same thing and passed ca smog with fed ecu.
If o2 sensors were different you would not be able to swap ecu's without swapping O2 sensors as well.
Edit:
Oh and a lean burn motor doesn't 'need' a wideband. The 3-stage p2j ecu runs the d15b with a single wire narrowband o2 sensor just fine with lean burn. It all operates in open loop anyway, which means the o2 sensor is out of the equation and it controls fuel based off a predetermined map/setting.