O2 sensor and fuel variances?

[damslowsi]

B16a's have 2 O2 sensors. One in the header and one in the Cat. If your remove your cat and replace it with a test pipe with the O2 sensor in it. What does it do to the computers fuel mapping systems, and spike perameters? I just worried if i do remove it there will be a computer code flashed. Or will make the car run either too lean or rich. Has anyone done this and know what happens?

[swedishfa]

all I know is that I hit some ice and broke my secondary O2 sensor and my car runs really slow! my suggestion is to tap a hole in your test pipe and put your O2 back into that, don't just take it out of the car. You won't be happy with that.,

[SlickRedSi]

Well I am running a test pipe. And I have thrown a code with it on. Then I fixed the problem. Well the problem came back several weeks ago and threw a code. I notice that when it throws the code, it must be running a little rich which is sucking up my gas and I also notice it is running a little different. I know that the other O2 Sensor in your cat reads the exhaust gases to see if you are running too rich or too lean and it adjust accordingly. I believe there is a thread on this board somewhere. I just have to find it or if you want, feel free to look.

[damslowsi]

Thanks for the info. Question though do you know what the code was that it threw? Reason is i made the pipe at work today and put the O2 sensor at the vary tail end of the pipe. It seems to be working ok for now. I do have a intake, header so hopefully that will let it run rich enuff so it dont burn rings or valves.