smogged, here's the results Options

[6strngs]

hmm, I still have high NOx, so, I guess that even though I was finally able to get my check engine light to go away that my EGR is still not functioning perfectly. oh well though, guess I don't have to worry about it for another 2 years

[Celicaguy13]

It's probably your cat and not your EGR.
The cat takes Oxygen from NOx and adds it to the CO to make CO2, N and O2.
If you look your CO is high too....

No no. The cat is the last part of the emission matrix you should even consider to do a proper repair. The EGR's primary function is to reduce NOx and since you already know you're egr is not functioning properly, then that's what you need to repair. I have conducted experiments on this by testing my car with the egr connected and disconnected. The differences in NOx was about 400 ppm. And by looking at your CO2 and O2 readings, it seems as if your cat is still reducing efficiently.


LOL Hey 6strngs... I live about 30-40 minutes from you.

This post has been edited by Celicaguy13: Mar 27, 2007 - 9:35 AM

[alltracman78]

It's probably your cat and not your EGR.
The cat takes Oxygen from NOx and adds it to the CO to make CO2, N and O2.
If you look your CO is high too....

No no. The cat is the last part of the emission matrix you should even consider to do a proper repair. The EGR's primary function is to reduce NOx and since you already know you're egr is not functioning properly, then that's what you need to repair. I have conducted experiments on this by testing my car with the egr connected and disconnected. The differences in NOx was about 400 ppm. And by looking at your CO2 and O2 readings, it seems as if your cat is still reducing efficiently.

It might be the last, but that doesn't mean you shouldn't consider it...
The cat also converts NOx as well as HC and CO. It's a THREE way cat.
For example, my truck has a welded shut EGR. And it passed NOx with flying colors [we have the same emissions standards as you].

Your cat probably isnt' clogged.
And I doubt it's toast yet. If it was you would probably have a P0420 code.
The only way to know for sure is to look at the car. I can't tell how well you cleaned out the EGR, or the actual condition of the cat from 3000 miles away. :shrug: