it's a 93 integra, with a B16 swap, ran to a P30 ECU. everything was running fine, but 2 weeks ago, a CEL would come on and go off, and when it was on, the car would hunt for idle. I replaced the only O2 sensor in the car, same problem. But the old one was a beeotch to remove...any ideas?

i also have a code 23, knock sensor, that will go in next weekend. all wiring is fine, has been double checked from the ECU to the o2 sensor, and same with the knock sensor..

thanks.