A catalytic converter could need replacing for a couple of reasons. If your municipality require emissions testing a defective converter could be the source of fail emissions problem but the most common reason that a converter is replace is plugging off the exhaust system lowering the performance of the engine. If your car appears to run properly but lacks power a clogged catalytic converter could be the source of the problem. One of the quickest ways to verify this is an intake manifold vacuum check. If the vacuum reading is low and steady this is an indication of a plugged converter.
You will need to replace it.
I never replace it ,only if you need to like before a smog test so it can pass emissions
So you can efficiently burn unleaded gas.
No, that will not work. A restricted catalytic converter will need replaced.
There's no possible way to pass inspection with a bad catalytic converter, if if you find out you have a bad catalytic converter during your inspection you have a chance after you after you have replaced the catalytic converter and the inspection no no charge/free!!
If it came from the factory with a catalytic converter then it must have one
they are usually bolted on in the front of the converter.
Cleaning a catalytic converter to reset an error code is only a temporary solution for a 1999 Grand Am SE. To clean the catalytic converter in this case you would need to gently blow out any build up with an air compressor. You would also need to replace or clean the oxygen sensor as well or the code will not reset.
If there are no exhaust leaks or other codes, the catalytic converter has failed. You will need to replace it.
Catback is shortened slang for "everything back from the catalytic converter". It is a bolt on exhaust which connects to the rear of the pipe holding the catalytic converter, and ends with the muffler and exhaust tip. In short, you need a cat to have a catback.
To pass emissions you do.
This means that you need to replace one of the lights. Bring out your users manual t see if that will assist you.