Failed Emissions Inspection

[jsinton]

Hi all. I failed emissions inspection. I failed for hydrocarbons and NO2, but not carbon monoxide. It has a recent tune up, a new ICU, coil, and I think it runs great for a car with 150,000 miles. It was really cold the day I had the inspection done, maybe my car doesn't warm up enough for the catalytic converter to work. I'm leaning towards replacing the catalytic converter and the oxygen sensor. I was wondering if anyone else had any ideas. Thanks.

[Solntse]

oxygen sensor would be my bet.


change oxygen sensor, fill it up with the best gas grade, drive on the freeway for about 30-45 minutes and then go for an emission test, should be alright then.

this trick worked out very well my old 90 galant that used to smoke whenever I would start the engine.

[mr bishi]

if your exhaust is slightly blowing esspecially before the lambda probe this will put your hydrocarbons through the roof also if you have a cat give your car a hammering before your test to get it red hot ( they work better hot)