I failed emissions yesterday my Nox ppm was doubled what was allowed. I'm running a chipped p28 on a turbo b18c1 with a cat. The only thing I could think of could be the tune, it was tuned on the street with a wideband, I don't know what the af we tuned it was at. Any ideas to why there's too much nitrogen coming from my car?

 

turbo.

 

hah, Turbo is hard to pass emissions. especially on a integra that doesn't come with it stock.

 

There was no turbo involved, the car never saw boost. It was in vac the entire time.

 

LOLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL

 

hope it wasn't a hiflow cat doh

 

if the cat is a "highflow" then it's doing little to nothing for NOx.

you can try to retune the vac area of the fuel/ign maps on the ecu but it will run like a complete bag of crap and it "might" pass.

if it only failes NOx try retarding the ignition timing allot and try again.

 

If you're on a P28 your secondaries are probably open all the time. Try running a vacuum line to them so they'll be closed as long as there's engine vacuum. That might cut it down enough, who knows