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Discussion Starter #1 (Edited)
How do you disable the O2 sensors that go behind the cats, I put full exhaust on my car with no cats...do they still need to be there or can you just unplug them?
 

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what symptoms do you get if you dont turn them off. what ses lights will it trigger?
 

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Rear O2s only test your cats. If you dont' have any or the sensors go bad, it will through a CEL. It will not effect how your car runs, only the fornt O2s do that. Since you did a full exhaust, you might wanna get your car tuned. I would assume your running rich right now and your tuner can disable the rear O2s.
 

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Discussion Starter #5
I got a code for multiple mis fires and was told that could be the problem then I took it in and they said I had 3 bad ignition coils...I replaced only the 3 bad ones with no result...should I do the rest with new spark plugs?
 
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