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

Forum > Failed Smog Test > Question

2001 Honda Accord 2.3L failed for high HC Hydrocarbons

How do I lower HC on my Honda Accord? I failed the smog inspection by 15 PPM.
Answer:

Hydrocarbon is basically raw fuel (gasoline). High HC is usually caused by to ignition (spark) related problems. We recommend performing a tune-up on your Honda. Inspect the spark plugs, wires, CAP and rotor. If all looks good, you want to focus on the air/fuel mixture. An engine running lean or rich will produce high HC as well. 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