Hey fellows-as the title said, I was curious about that cause I think that mine is, and may be a factor why I failed emissions. My NOX readings were way high, and I was told that high nox is caused by either a clogged cat or bad EGR. Any way to test the cat before I pull it off? Thanks guys.

 

Did you check the EGR first??

 

yeah, take it out, clean it, clean the hole and any crap that you see around it first

 

does that sound like a bad EGR?