turned off rear 02's and COT-can i still run cats?
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turned off rear 02's and COT-can i still run cats?
I turned off the rear 02's and cot on my 02 Z06 when i put my off road pipe on. however on the dyno I found the pipe to have no gain in power. So can i put my stock 02 pipe back on and run cats without having the rear 02's functioning and having the cot turnrd off? Thanks.
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Re: turned off rear 02's and COT-can i still run cats?
I don't think anyone knows for sure the effect of turning off COT with cats installed. I have cats with O2 codes and COT turned off, but I'm not worried about frying the cats as long as there are no other negative effects. I'd rather risk the cats to have my a/f not affected by COT dumping fuel.
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Re: turned off rear 02's and COT-can i still run cats?
COT (Catalytic Overtemp Protection) dumps fuel at PE/WOT if the cats reach a certain temperature, to cool them down and protect them; but the down side is that it skews your a/f ratio rich.
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Re: turned off rear 02's and COT-can i still run cats?
If you want to keep your cats, I would not disable COT it could melt them. You can adjust the temp that it kicks in would be better than not at all.
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Re: turned off rear 02's and COT-can i still run cats?
Yep, worst case you would melt your catalytic converters - you would know pretty quick if this happened (or at least you would know something is wrong) - your exhaust would get quiet, your car would have no power, and your headers would probably glow - if the car ran at all.
Now since the cat temperature is a calculated and not measured value there is some room here to work with - if you have longtube headers, etc. then you have moved your cats farther downstream - so they are probably already running cooler.
What it comes down to is the only way to know for sure is to try it... if you are still running stock manifolds then I doubt it will work, but with longtubes there is a possibility.
Now since the cat temperature is a calculated and not measured value there is some room here to work with - if you have longtube headers, etc. then you have moved your cats farther downstream - so they are probably already running cooler.
What it comes down to is the only way to know for sure is to try it... if you are still running stock manifolds then I doubt it will work, but with longtubes there is a possibility.