Civic VX lean burn

[ivicR]

Originally Posted by Whoops

Fourth alternative. In California, legally, the seller of a vehicle is responsible for making the vehicle pass the smog tests. If they can't do that, then legally they have to give you a refund of your money and take the car back.

Do you know where this information is on the web ? i looked into it and hadnt found any thing, thus why i didnt go back to him originally. If i kan make him change it back or "fund" me the money to do so, i will. Thanks.

[SVOboy]

At this point, I would stop trying to fix what the previous owner broke and just do it from scratch. Meaning, cut out the O2, pull those wires out completely, then wire directly from the o2 back to the ecu according to the pinouts/wiring diagrams you can find in your helms manual. It shouldn't take that long and it will actually work.

[ivicR]

Thanks for the scat. I was able to re-wire the harness. now just waiting for the new o2 sensor.

Originally Posted by mwebb

the actual Honda diagram is available on the Honda information website , there is a fee , but it is reasonable .

or
this is all i have on this laptop -

use the diagram with the red rectangle around it
for this application
use only an OEM Honda 02 sensor , do not use an aftermarket universal

there is a reason
the shielding on the thimble is incorrect on the aftermarket 02 sensors so the exhaust pulse from #3 cylinder causes a spike , so the 02 sensor appears to cycle every 720 degrees of engine rotation
the system will never be in fuel control
it will be difficult or impossible for a DIY type to track that down and solve it so
use only an Honda OEM 02 sensor purchased by the vin of the car for this application .

do not ask me how i learned this .
pain is a very good teacher .

should you require the waveforms to verify , just ask

[ivicR]

Would you be kind enough to post a scat of the ecu pin out ? i think some thing fishy was done there as well.