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Old 04-10-2012, 04:39 AM   #1
07STifastashell
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Default Catalytic Converter Dead Already?

My 2007 wrx sti has just passed the 30k mile mark (and received the 30k service), and I am already starting to smell rotten eggs when starting up the car and when hitting redline sometimes. I can also feel a slight loss of power. These two symptoms are almost surely caused by some sort of faultiness in the catalytic converter (also been confirmed by my friend's uncle, a mechanic). My car is passed the 5 year/36k mile warranty (or whatever it is), but I've heard somewhere that the EPA requires that any emissions features are to be replaced under a warranty of 8 year/80k miles. Can someone shed some light on this for me? I plan on calling Chaplin's Subaru to see what they can do, but I want some info on this prior to contacting them. For reference, my car is completely stock except for a Greddy ti-c catback exhaust, but I figure that won't be a warranty issue as it shouldn't effect the cat itself, at all.
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Old 04-10-2012, 04:56 AM   #2
STI Dy
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How long have you had the smell? Any changes in gas like where you fill up or additives? Bad sensor maybe?
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Old 04-10-2012, 05:00 AM   #3
07STifastashell
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Honestly, I've had the smell for as long as I've had the car (around 8 months). I've been told by friends that have been driving behind me that my exhaust really smells when I floor it. Personally, I've only started noticing it recently though. I go to the same gas station almost every time, and I don't use any fuel additives. I don't have a CEL so I don't think it's a sensor.
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Old 04-10-2012, 05:23 AM   #4
CGMDan
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Your cats are 8/80k mi.
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Old 04-10-2012, 03:17 PM   #5
Rootus
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You're positive you actually have a catted DP? Even a catted pipe with a WG bypass will stink a bit. With a properly running engine the stock cats should last damn near forever.
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Old 04-10-2012, 03:29 PM   #6
07STifastashell
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I know. That's why this is weird. There's an odd one out of a million that will fail prematurely though. I think I have it haha. I'm positive my dp is catted, it's the stock dp.

Anyways, chaplins said they will cover it but will take an hour to diagnose to tell for sure. If I'm right, then it's free of charge. If not, I pay a hundred bucks for that hour in labor.
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Old 04-10-2012, 03:33 PM   #7
sc00ter
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If you aren't willing/able to remove the DP and check the cat yourself then it looks like you don't have another option.

However, if it was my car I would just take that $100 and put it towards a catted aftermarket DP and flash stage 2 with an Accessport.
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Old 04-10-2012, 04:11 PM   #8
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I’m catless and never smell an egg odor. There is a smell but not eggs. Yup, good time to go aftermarket dp.
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Old 04-10-2012, 06:08 PM   #9
07STifastashell
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I know haha I'd love to get a Cobb bellmouth catted dp and AP, but I think I'm going to get the cat replaced first then do that within the next couple of months. Thanks guys

Well that was a painful experience. I take my car in at 10:00 AM this morning, and they don't even start looking at it until 1:00 PM. Then they called to ask what the symptoms were to which I replied rotten egg smell, occasional puff of white smoke when starting the vehicle, and lack of power sometimes. When I dropped my car off, I signed a form that allowed for a one hour labor charge of $101, thinking that there would be no way I'd end up paying anything. They then let me know at about 1:30 PM that if there isn't a CEL code for the cat, they can't even replace it under warranty according to their codes (hmm...convenient time to tell me after I've already basically paid for the service). Scott said that there isn't any way that the cat would be dysfunctional and not throw a CEL (which to my knowledge is not always true; it could be clogging up or clogged up and not display a CEL). He reassured me by laughing when I said that and telling me that in his 11 years of service experience, he's never seen a cat that has not been properly working that does not throw a CEL. They then took my car for a test drive to make sure that there was no loss of power; they found out that the power was normal and said that they "could not replicate the smell of rotten eggs". The smell is obvious if you are standing behind the car when you rev it, and it sometimes even floats into the cabin when driving...but they could not replicate it apparently. Fortunately, they wrote me down for only half an hour of labor so I only wasted $54 and many hours of my time. Thanks for nothing Chaplins. New catted dp on its way soon...

Last edited by 07STifastashell; 04-12-2012 at 09:05 PM. Reason: Back from service
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