I need some help and I am hoping that any one can help me figure this out. My audi has a problem; a part in the exhaust system is getting red hot. I believe its the catalytic converter, but just want to make sure. It also is putting in the exhaust in the rear. Any help will be grateful!!!!

Thanks

 

If your cat is clogged up it would end up getting red hot. Have you looked under the car to check where exactly the exhaust is heating up? Also what do you mean its putting out of the back of the exhaust. Pictures/videos would be great.

-Kyle

 

The turbo can get red hot, even white hot if you're really running it. Other than that the cat can get red hot if it's plugged and legally the only thing you can do is replace the cat.

 

time for a new cat. its clogged.

 

When I put it was putting. I meant that it wasnt a constant flow out of the exhaust. I just want to make sure that its the cat and not the turbo. But I believe its the cat.

 

You catalytic converter should NOT be getting red-hot.
You need a new one.
You prolly also need some serious engine-maintenance work done if your cat is bad.
Cats get clogged because of oil leaks getting into the exhaust. If this is the case - putting a new cat on will only be a temp fix, cause the new cat will become contaminated as well.
You need to figure out your true engine issues before putting on a new catalytic converter.

 

Not just that. They can get clogged from running too rich for long periods of time due to bad front O2 (which also goes bad from running too rich, so that might be another symptom, rather than the cause), bad/dirty MAF, fuel injector problems or any other of a number of possible problems.

 

Before you go chasing other problems around just unhook the exhaust from the cat and see if if you are still having problems

 

+1 dragonrage. An incorrect fuel mixture, i.e too rich can cause the CAT to heat up excessively, causing it to melt and become solid. I would first check fuel mixture with either vagcom or by using a 12 gas analizer (CO% machine). If they sys. is running rich and you put a new cat on, the same situation will occur. O2 sensors are a common cause.