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Old 06-16-2010, 11:15 PM   #1
SubyRS03
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Default Funky Smell when car is romped on?

hey guys i got a 2003 2.5rs and everytime i get on it hard its got a weird smell to it like eggs almost but past there date but i wanna know if you guys have had any symptoms like this im thinking cat too but want some imput? thanks
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Old 06-16-2010, 11:42 PM   #2
THEVERGE
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From what I've heard, that could be a sign that a cat is going. I'm not positive though.
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Old 06-17-2010, 12:14 AM   #3
SubyRS03
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^^yea thats what my cousin said give me all the more reason to get my stromung hi flow cat
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Old 06-17-2010, 12:23 PM   #4
PhilSine
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Yep...catalytic converter failure.
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Old 06-18-2010, 12:10 AM   #5
SubyRS03
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(TO EVERYONE)im thinking of either getting a stromung hi-flow cat from boxer 4 for $359.99 or should i just go and get the stromung Catless pipe for $279.99.???? i just want to know if any of you guys have done this and how did your car run and how loud did your car become. cause i have had a cat clog before on other cars and had some serious problems from this issue so i took em off and used a jack handle and gutted it but i have three cats and hard to pound out cause of shape SO PLEASE GIVE SOME ADVICE????
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Old 06-18-2010, 01:25 AM   #6
subaru2.5rs
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yeah my 05rs does that too and it reeks! i have no idea what it is and ive heard several times that its the cat going. has anybody told you how much it will run you to fix it or anything?
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Old 06-18-2010, 07:08 AM   #7
SubyRS03
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^^well ive been looking into replacing it with a hi flow cat or a catless pipe because just to order a new one from subaru is 650 its cheaper to put a hi flow and get better mpg and a bumpage of hp
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Old 06-18-2010, 10:23 AM   #8
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Quote:
Originally Posted by SubyRS03 View Post
^^well ive been looking into replacing it with a hi flow cat or a catless pipe because just to order a new one from subaru is 650 its cheaper to put a hi flow and get better mpg and a bumpage of hp
If this is a street car which I'm sure it is, don't even bother considering a catless pipe.
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Old 06-18-2010, 11:59 AM   #9
Bluefoton
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As Kandy said, forget about catless. It will stink, pollute AND be noisy.

Keep in mind that rotten egg smell has also been associated with HG failure sometimes as well. Double check before you change cats...
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Old 06-18-2010, 12:50 PM   #10
caino
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Do you have emissions where you live? Probably won't pass with a straight-pipe on there. If not, you can do it, but it won't be nice to the environment. Of course, if you don't have emissions, you could always gut the cat and save some $$.
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Old 06-18-2010, 05:32 PM   #11
SubyRS03
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Dont really have emmission laws that i know of? lol
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Old 06-19-2010, 06:40 PM   #12
o'doyle
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I just did the front half of my exhaust: Borla headers, Stromung HFC, etc.

If you let that rotten egg smell hang around too long, eventually your cat will clog like mine did. Then it'll shatter into the rear one: again, like mine did. Then, the backpressure will cook out an exhaust manifold gasket or burn valves.

Take care of it before your engine craps the bed. The Stromung is raspy, but once you put the axleback on it you won't care anymore

Also, if you end up needing to extend your rear o2 sensor (I did), take pics of the stock plug and email them to Caspers electronics when you buy your extension harness. I paid overnight shipping and wound up with WAY wrong connectors. Oops.

BTW, Dale @ Boxer4Racing is a fantastic human being. Best customer service I've seen in the automotive world yet. He's getting my money again for sure
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Old 06-20-2010, 02:00 PM   #13
RaceFaceXC
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Quote:
Originally Posted by Bluefoton View Post
As Kandy said, forget about catless. It will stink, pollute AND be noisy.

Keep in mind that rotten egg smell has also been associated with HG failure sometimes as well. Double check before you change cats...
A leaking heater core can have a sulfur gas like smell, also. Never heard of it depending on how hard one is accelerating, though. usually stinks when heat is turned on or all the time when the engine is warm.
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Old 06-20-2010, 11:16 PM   #14
SubyRS03
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^^yeah i only smell it when i get on the gas and when i slow down and park or just slow down you can smell it thats why everyone is saying cat converter. plus no water in oil or white smoke so i know its not a head gasket so im just going to buy the stromung hi flow cat pipe and eliminate 2 of 3 cats
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Old 06-21-2010, 12:38 AM   #15
o'doyle
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should only be 2 cats I b'leev:

http://opposedforces.com/parts/impre...llustration_1/

Stromung hfc replaces this whole bit:

http://opposedforces.com/parts/impre...llustration_3/

Before you order, climb under the car and locate your rear o2 sensor. My 04 had it in the dang front cat--and therefore I needed an extension. Bleh. Wish I had known that beforehand, lol.
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