Re: Pre and Post cat. O2 sensor graphs

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Posted to Technical Theory Forum on 6/20/2002 33 Replies

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Yep. I always use my dyno and gas analyzer to diagnose cat failures. Here's one that set a P0420 and it blew zero's and 15%+ CO2. Would you change the CAT?

[1998 Acura 2.3CL, HO2S Waveform]

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