catalytic converter help

drboudreaux · 05-25-2005, 10:58 AM

I have a 1997 Subaru Legacy 2.2L. Both cats are rattling and the check engine light is on - it has also failed emissions. I have been told differing things - and I am wondering what folks on this board think. Some people have told me that I can cut out the pre-cat and the cat and replace them with one big cat, hooking up both the upstream and the downstream O2 sensors into the new big cat. Others have said that I cannot legally do this. Is this legal? Secondly, will having one cat screw up the emissions such that it will throw off the downstream O2 sensor and cause the check engine light to stay on, thus continuing to fail emissions? Any help or advice would be appreciated. Also any websites that offer inexpensive replacement cats and sensors would also be valuable. Thanks in advance.

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fibuz · 05-25-2005, 11:09 AM

It really depends on what state youre in to determine what you can get away with.

Personally, I'd just take it to an exhaust shop and have then put at least one new cat in...probably the cheapest route.

Good luck,

fibuz

suby2low · 05-25-2005, 05:50 PM

^^^^what he said.

05-25-2005, 10:58 AM	#1
drboudreaux Scooby Newbie Member#: 87890 Join Date: May 2005	catalytic converter help I have a 1997 Subaru Legacy 2.2L. Both cats are rattling and the check engine light is on - it has also failed emissions. I have been told differing things - and I am wondering what folks on this board think. Some people have told me that I can cut out the pre-cat and the cat and replace them with one big cat, hooking up both the upstream and the downstream O2 sensors into the new big cat. Others have said that I cannot legally do this. Is this legal? Secondly, will having one cat screw up the emissions such that it will throw off the downstream O2 sensor and cause the check engine light to stay on, thus continuing to fail emissions? Any help or advice would be appreciated. Also any websites that offer inexpensive replacement cats and sensors would also be valuable. Thanks in advance. * Registered users of the site do not see these ads.

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05-25-2005, 11:09 AM	#2
fibuz Scooby Specialist Member#: 53410 Join Date: Jan 2004 Chapter/Region: SWIC Location: Tucson, AZ / Port Angeles, WA Vehicle: BE-> GD->GR->SG->BL WAawd.org	It really depends on what state youre in to determine what you can get away with. Personally, I'd just take it to an exhaust shop and have then put at least one new cat in...probably the cheapest route. Good luck, fibuz

05-25-2005, 05:50 PM	#3
suby2low Scooby Newbie Member#: 82633 Join Date: Mar 2005 Chapter/Region: NESIC Location: Claremont, nh Vehicle: '08 WRX STI Silver	^^^^what he said.