Here is the story...
'91 CRX B16A2 Swap, and a few bolts ons, not sure what computer it's running.

I recently read a thread about bogging B16a CRX's and I found some very valuable information in there. My CRX is starting to bog more and more sometimes it even stalls at idle it is bogging so much (just started recently). When I bought the car the check engine light came on once in awhile, the guy I bought it from (Nicest Guy Ever) told me he had taken it to a garage and had the code checked and it was in relation to the O2 Sensor. He said he replaced the sensor and it still came on now and then but he just gave up trying to fix it.

So I found out in the thread I mentioned above that there should be two O2 sensors for a B16 CRX swap, however since most aftermarket headers only utilize one O2 bung, most people don't correctly wire up or modify their Exhaust Manifold and get both O2 sensors working. I have a DC 4-1 header, which of course only has 1 O2 sensor bung.

So my question is if I buy a chipped ECU that uses only one O2 sensor, would that alleviate my problem of getting both O2 sensors working correctly in a Exhaust Manifold that doesn't support them? (And no I don't want that crappy Hasport Manifold)

 

yup, most programs dont rely on a o2 signal, they just throw fuel according to tps signal..you may wanna look into running a hondata or cheaper a chrome system...

it shouldnt be bogging at all with one o2 sensor. my suggestion is to diagnose the problem accordingly, because obviously something is wrong somewhere in there..

 

Well like most B16 Swaps I have an idle that never wants to make its mind up, but the bogging definitly seems to have something to do with that sensor because someone told me to disconnect it, and it should just run more rich. Well I disconencted it and not only do I feel more power, I also don't have even a fraction of the problems I have when the O2 sensor is hooked up.

Also I should mention ever since I modified my intake (Made a CAI into a short ram), the car hasn't been happy with it at all, it seems to idle higher, and just not drive as good at low speeds.

I haven't checked my spark plugs lately, maybe it's time for a change.

Any ideas?

 

Running one is worse than running none. I could explain this, but i don't have time. Keep it disconnected
(yes, it should be bogging with one O2 connected - it's reading the results of 4 cylinders when it's supposed to be seeing only 2. This makes the computer see that there is more oxygen coming from 2 of the cylinders than there actually is, and the other 2 it doesn't have a reading for - this is leads to "hunting")

CAI - Doesn't really matter, should not drive worse - intake can't cause that. Look at other possible causes.

If you need to convert to OBD1 with a chipped ECU checkout rywire.

 

Thanks for the info NikoZai, anyone have any neat tricks to get the Check Engine light to turn off now? lol

 

So what would be the problem with an A6 with a DC 4-2-1 header since you are only running one O2 sensor stock and one O2 sensor with the aftermarket header? My car has the exact same problems as the OP.

OP if you do not like that I made this post you your thread tell me and I will delet it. I didn't feel like making an almost exact same topic and it seems that you question has been answered.