I passed with flying colors 2 years ago, the major difference are the LT's instead of the shorties I had. You think that is the problem? The EGR is gone now too, AZP&S also removed the air pump and told me it doesn't help much on the car. Different heads too, it failed HC and CO.....

HC=1.28 Should be 0.80
CO=15.25 Should be12.0

I could give it a tune up, new plugs, clean injectors and so on. But will that help? It has a new CAT, put it on yesterday. Damn, I don't want to deal with this again! Thought I had took care of it with a spare CPU with an emissions tune, it worked great 2 years ago!!!

 

You realize that link goes to the sign on screen and no one can read the post, unless they sign up?

Why not take the few seconds required to copy/paste the information into this thread? It will increase your chances of getting help quite a bit.

 

Sorry, thanks man!

 

So far I've been told to put the EGR equipment back on and run the CAT more since it's new. Thanks!

 

High HC and CO generally indicates its running too rich. Since it didn't fail on NOx, the EGR system being missing is not a factor at this point. If you lean it out enough to pass and HC and CO, NOx may become a problem, because as HC and CO go down, NOx increases.

Any chance you have exhaust leaks before the O2 sensors, or misfires, both of which will cause it to run too rich? Any possiblity the extensions for the O2 sensors are screwed up, or the O2 sensors got contaminated by the initial burnoff from the header coatings (if you have coated headers)?

 

I'll check the O2 sensors, it shouldn't be running lean on the emissions tune though unless something is wrong elsewhere. I passed easily 2 years ago with that tune. I'll check a few things today you listed, would running cold plugs matter? I have the NGK 6's i believe.

 

It is due for an oil change, I'll do a nice tune up today. I've tried that stuff before with no luck the first time I tried to pass it with the CC306.