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CEL, help a brother out!

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Old 01-13-2012, 08:12 PM
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CEL, help a brother out!

Alright, my check engine light is on. The computer threw two codes. The first was bad knock sensor, which I had replaced. And the second was "Catalytic converter below efficiency" aka, the CAT has failed. I plan on doing the spark plug fouler trick for the downstream O2 sensor (After the CAT) but my main concern is: Is my engine running lean or rich? Is there a way I could just have the engine running at an ideal medium? I've been getting poor fuel economy and a slight engine knock as well. I plan on having the fuel system cleaned by the mechanic. I don't really care about the CAT and WILL NOT pay the $800 for a new OEM one.
Any tips, advise, or stories would be really helpful!

1999 Honda Prelude, engine is completely stock.
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Old 02-14-2012, 01:56 PM
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Re: CEL, help a brother out!

Similar problem..anyone>/?
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