Join the community and post your question. Use our Ask-A-Tech for free now! ASE experts standing by.

Forum > Failed Smog Test > Question

1982 Chevy P30 failed smog check for high CO.

What would have caused my Chevy to fail smog. It produced very high CO. My Chevy has a four barrel carburetor.
Answer:

Your Chevy P30 may have a defective carburetor. Fuel distribution is controlled primarily by the carburetor. If any component within the carburetor is defective air/fuel ratio can be disrupted and result in incomplete combustion. The presentation of too much fuel will produce high CO emissions. The presentation of not enough fuel will produce low CO emissions. If your engine's carburetor is defective you have two options. You can ask a smog repair station to try and adjust it or you can ask to have the carburetor rebuilt. posted by SmogTips Support

Related questions and answers you might find useful:

How Do I Get a Smog Check Waiver? by Margaret

Do I Need a Smog Check This Year? by Joy

View SmogTips.com in: Desktop / Mobile