dj BullDogg 2001

I have an issue with my cats smelling like a nice box of rotten eggs. Is there anything I can do so it doesn't do that? They only do it every once in a while.

I was also wondering what I could do to just give it alittle bit more bottom end throttle responce. Is it safe to take the airbox off on this car?

Žob

Try changing gas (brands), running some BG 44k, and then live with it.

Bollinger

Our spec for sulfur is very high compared to Europe. So a cat that works there smells here.

California has very tight sulfur regs, so you would be okay out here.

There is nothing you can do except change the cats. Staying with a particular brand of gas might work. Then again it might not.

Taking the airbox off is usually a bad idea. It gets you a little more air, but its hotter air since it comes from inside the engine compartment.

dj BullDogg 2001

I live in colorado which I herd has the worst gas in the us not to mention I am like a mile above sea level and the air here is like really thick.

I am going to leave the airbox on and just get a new cat. Is there an cat that would give the car alittle more power?

Žob

You could always just take them out. The car would still run clean off to pass emissions

Bollinger

There has only ever been one car which passed US emissions without a cat, the Honda CVCC. Remove them from an Audi 90, and you'll miss by a mile.

Bollinger

Try searching the net. The key when talking to companies about new cats is to mention that your current cats are destroyed. Not smelly but wrecked. For some reason it is illegal to replace working cats in the US.

Žob

Ask any of the UrS4 guys who run without cats.

Bollinger

Any state which tests to anywhere near the actual emissions standard isn't going to pass them.

Now, in many states, the testing is on a sliding scale depending on how old your car is. The older you get, the more emissions you are allowed.

That's the only way you are going to pass.

I have to agree with you on one thing, in any given state, if a UrS4 passes, and Audi 90 should pass without a hitch.

quattro90S6

Sweet someone with the same problem. I need a new sticker this month and my cats smell some times, but i have heard that they will still pass even dead and i don't really wanna dish $1000 b.c i think it is the passenger cat. But is that sulfer thing abut US gas true and my car rumbles, everyone asks what the hell is wrong, but after 3k rpm it is normal....