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Cat options, 2 CELs

 
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Old 02-01-2010, 12:57 PM
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Cat options, 2 CELs

Okay so we have a 1997 Base Auto (I know) Prelude and it has thrown 3 times consecutively, like clockwork, the CEL P0420. Catalyst System Efficiency Below Threshold. The Cat that is on the car is more than likely shot. Terrible smells and sounds are coming from it. I spent plenty of time on multiple forums researching the issue. There is a mod using a spark defouler that I stumbled across. But I think it might be best to replace the O2 Sensor, do the mod, and replace the Catalytic Converter. I say that because today it has thrown an additional code of P0401. It will be taken care of as well (EGR cleaning etc.). Finally here is my question? What is the best option for a quiet replacement for the CAT? Ebay has a supposed direct replacement Magnaflow CAT. Would it be pretty loud? Wish there was some Borla options.. I have also spent plenty of time on YouTube trying to sort through the countless options for exhaust sounds. But at this time I only want to replace the CAT. Further customization will be done at a later point in time.
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Old 02-01-2010, 01:25 PM
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Re: Cat options, 2 CELs

With my personal experience the cat doesn't make much of a difference in sound until you remove it. Things like the muffler and amount of resonators make a much larger difference than the cat. Just don't buy a high-flow/test pipe unless you don't mind dealing with the check engine light. My Random Technology one wasn't supposed to throw one but did on my car (OBDII) after installation.
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Old 02-01-2010, 02:32 PM
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Re: Cat options, 2 CELs

I have the same problem with my car, I was either gonna have meinike install an aftermarket one for $100 OR... I heard that you can put in a high flow test pipe (ebay for $15) and leave the o2 sensor in the rear out and install a resistor into the plug for it (dont know exact resistance needed yet) but if you do this you can trick the computer and the CEL will NOT come on and it will pass emmisions. I know people who have done this to civics and other cars and it has worked. Ill let you know if I come up with anything else.
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Old 02-01-2010, 03:20 PM
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Re: Cat options, 2 CELs

CTLude/djp thanks for the quick reply. I think the EGR valve problem is a little bit more critical. Could be wrong though. I am shocked at the thought that the CAT doesn't have more influence on sound. But that is great if it is correct. I don't want to have anything that draws excessive attention to myself/the car. Like to be incognito sometimes you know? I thought of gutting the CAT. No emissions in sh---y Alabama. A friend of mine did such on a different vehicle of his and used some sort of O2 replicator. It (the device) is supposed to fool the Comp into thinking everything is straight. He said the device worked for about a year and finally died on him and the CEL is back. I hate CELs or any other light that is not vital to operation. That's just my preference.
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Old 02-01-2010, 04:54 PM
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Re: Cat options, 2 CELs

P0400 is an egr problem
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Old 02-01-2010, 07:54 PM
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Re: Cat options, 2 CELs

I have a MAGNAFLOW high flow cat on my 97 base and it hasnt ever thrown a CEL yet....its an excellent cat.
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Old 02-01-2010, 08:37 PM
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Re: Cat options, 2 CELs

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Originally Posted by BatLude View Post
I have a MAGNAFLOW high flow cat on my 97 base and it hasnt ever thrown a CEL yet....its an excellent cat.
Where did you get this cat? and how much $ was it?
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Old 02-01-2010, 09:07 PM
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Re: Cat options, 2 CELs

Yeah where and how much? hehe

Found this one for $106.28 with free shipping!
I think I am about to order it.

1996-2001 Honda Prelude - Magnaflow Front Catalytic Converter - Direct OE replacement
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"Only after the last tree has been cut down, Only after the last river has been poisoned, Only after the last fish has been caught, Only then will you find money cannot be eaten."- Cree Prophecy
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Old 02-01-2010, 09:39 PM
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Re: Cat options, 2 CELs

I got mine from meineke in santee where i live...it was 100 installed....an danno i say do it thats about the best price your gunna find.
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Old 02-02-2010, 10:27 AM
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Re: Cat options, 2 CELs

Why not just go 2 autozone or something and buy a oe replacement?? Or if u know where an exhaust shop is, they can normally get u a cat and install it of course
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Old 02-02-2010, 02:11 PM
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Re: Cat options, 2 CELs

Look at what I found!!!

Does this help?!?!

Catalytic converter for Honda Prelude
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