ugh! emmisions suck!

[blacknightteg]

has anyone failed for NOx before?

[bam-bam]

Oh yeah. Check for causes of high combustion temperatures (Lean mixture, too much timing advance, vacuum leak, carbon deposits...)

Can also be a faulty converter, though. My wife's Civic wagon failed for high NOx last week. I checked all that tuneup stuff, all OK (engine only has 7000 miles) replaced the cat and it cleaned right up.

re: "fixing it for $100" most any muffler shop will replace the cat for $125.