Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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how can you tell?
if it is on the way out?
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Rover Steve
Member
Registered: 5th Mar 03
Location: stafford uni
User status: Offline
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It fails its emissions. If you take it along to an MOT station, they'll do an emmision test for you for a bit of dosh.
Ste
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Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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what if it smells of old eggs?
coz its starting to smell more then it used to?
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wezjax
Member
Registered: 28th Mar 02
Location: mansfield,notts
User status: Offline
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watch it walk through the cat flap.
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wezjax
Member
Registered: 28th Mar 02
Location: mansfield,notts
User status: Offline
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seriuosly tho'. my cat caused me loads of trouble when it went.
wouldn't say it smelt more either.
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MikeH
Member
Registered: 3rd Apr 03
User status: Offline
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Maybe the ECU is doing strange things and causing the smell
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Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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my mot is due in bout 3 months so if it goes illbe getting a high flow one with full sysem just cant afford it
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Red_SXi
Member
Registered: 23rd Sep 02
Location: Dunstable Drives: 52 Plate BMW 3 M Sport Coupe
User status: Offline
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MY mates CAT is rattling like fook, like it is braking down on the inside, do u reckon his is going?
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Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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it can come loose mine did
i got it re set with new mounts has been fine since
but if it sounds like marbles its fooked
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Aussie GSi
Member
Registered: 5th Aug 02
Location: Sydney, Australia. Drives: Corsa B GSi 16v
User status: Offline
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YES!
My cat (I'm pretty sure it's my cat) is rattling and groaning like an old bitch with a metal walking stick! It doesn't do it under acceleration. I've only noticed it when I take my foot off the accelerator to slow down. It's giving me the shiits! I'm going to check out some high-flows this week.
Do you'se think it's the cat decintergrating inside? It's not the heat shield above the cat, I've checked that already.
I've heard about a GSi having a problem, where the cat was stuffed, and the exhaust was coming back from the cat, disturbing the EGR. I've been having probs with my EGR for a while! Hopefully a new cat will eliminate 2 things at once. 
Thanks dudes
C
[Edited on 12-05-2003 by Aussie GSi]
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Stu_22
Member
Registered: 25th Mar 02
Location: Luton
User status: Offline
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I got loads of small shiney peices of metal flying out of my exhaust when my cat broke up
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3CorsaMeal
Member
Registered: 11th Apr 02
User status: Offline
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Mine alwyas stunk of egg, even when i got a brand new one, they just stink......
They rattle when broke, i put a decat in recently...cos i broke my 2rd one...
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Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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The eggy smell does not mean the CAT is failing. Its just a bi-product of the nasty gases being converted to inert compounds. If your CAT is failing, it will rattle when changing gears and when your revs are at high idle, this is what i found in my experience. Run the engine to 2k RPM and listen for a rattle, if you hear it, your CAT needs replacing.
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