hey i was wondering is it possible to gut my cat myself or is it so hard that i have to bring it to a shop? for a 2000 S4

 

Your gona have to do that yourself, technically its illegal to tanper with a cat if its still good. So no shop is going risk gutting one. And be careful when you do gut it, its possible that you might throw a code, dont know if you still have a warranty or not?

 

http://www.audiworld.com/tech/eng.html

Check this out there is article on Dp install + another one for gutting the cats

 

its mostly the removing / install part thats a pain from what ive seen.

u have to relocate the 02 sensors so u dont throw a CEL.

 

the problem is that im throwing a CEL right now and i was told that it was my cat because my 02 sensor is heating up i already got a new 02 sensor. the shop would do it for 700 dollars but i was hoping i could do it myself

 

The cats have a 8/80k warenty, so if you are under that go to the Dealer, it will be free.

There are 4 cats, 2 pre cats after the turbo, then the big post cats. If your post cats are dead, then you need new DP's or install new ones, you only remove the pre cats.


yes, you will throw a code, the secondary O2's need to be moved past the post cats. Gutting the DP's is the super easy part, removing & installing the DP's in the PITA, expect at LEAST 8 hrs to remove them.

 

its not illegal to remove the cats as long as the emissions are within limits ( the presence of a cat dosnt mean it will fail emissions ) you can have it tuned to compensate then return it later when its passed

 

Dave in the US, it is very illegal, even more so if you live in CA. You can't even purchase a used cat in the US from a retail shop or wrecking yard.
Even if you pass emissions, you can still fail for other things on the car (mostly in CA)

 

i bought the car from a private dealership though. so does that mean audi wouldn't fix it?

 

It means you might have to work a little harder to convince them to do the work, but yes, they should cover it. It is a federal law in the USthat emmissions equipment is warranted for 8 years...this includes PCV valves, catalytic converters, etc. As long as there is no evidence of something apparent on the car that could have caused the premature failure of the equipment, then it is the manufacturers responsibility to fix it free of charge.

That being said, don't forget that you catch more flies with sugar than vinegar. Try approaching the dealerships humbly and see if you can get them to willingly do the work before getting medieval on their asses.