not true

 

depends on OBD 1 or 2

OBD 1 doesn't care about the CAT efficiency (edit: AFAIK), but OBD2 does and it will throw a code if your cat isn't efficient (which if you don't have one it will deffinately not be efficient).

so if you have OBD2, you either have to get a test pipe that has the CAT material by the O2 bung (so that it approximates the CAT for the sensor, or do the resistor thing, you can search I am sure to find out how to properly fool your system into thinking the CAT is functioning properly without a CAT actually there, but seeing as it is highly illegal to use on the street, i am sure you are only doing this for the benefit of the track, and not having to reset your ECU after each race event, right?


[Modified by samagon, 11:23 PM 6/12/2002]

 

the technian said my cat convertor isn't working which is causing an exhaust leak, it makes a rattling sound whenever i hit 3500 rpm and then goes away. so if my cat isn't functioning properly is my OBD2 sending a different code to my ECU? wat does the code do? how will it affect my car? and how can i fix it when i put in a testpipe

 

the obd2 cat code won't effect your car, it will just annoy you by glaring at you all the time. A temporary solution for a testpipe is to get a bung welded with screen like stated above, however I origionally had that, and it wore out over a year. The permanent solution is to go revert back to obd1 if you're really intent on having a testpipe. That's what i did, a little spendy but no regrets.

 

Geeser, I am 99% sure this is NOT your cat, take it to an acura dealer and have someone ride with you, explain the sound to them, if I am thinking about this right, you want to either replace your A-pipe, or go with a header. a common problem with integras is a piece in the stock header that breaks off, and rattles between 3k and 3.5k rpms. get this checked out before you put a cat on it, and the sound doesn't go away.

if your cat isn't functioning properly it will throw a code, your CEL will be on and that will be it. the only bad thing is that A) you have that CEL glaring at you from now on, and B) if something is seriously wrong with your car, you will have no knowledge of it, until things get really bad.

 

will there be a light that comes on on my dash?

ya my friend said it mite be the a pipe too, i did bring it to the acura dealership and they said that it is the cat, *******