[Hylander]

So my truck passed smog but the HC and CO numbers are on the high end.
What might be the cause for the high readings ?

 

[spun360]

whats hc & co. tell cali to go f itself

 

[dmcelhannon]

Just name it. High mileage, worn plugs, filters, injectors, old sensors, dirty oil, so-so fuel, ect. ect. ect.

We don't live in a prefect world. I'd just take care of the vehicle and go about your way.

 

[Hylander]

Now that its narrowed down,
Should pass smog even better next time

 

[cblake]

Spun said it the best. I lived there for 2 months one time. Was very happy when I left.

 

[B-300]

High HC is unburn't fuel, caused by misfire (To lean can cause this). High CO is rich mixture. If your still within limits, an oil change and tune-up will help as mentioned above.

 

[spun360]

too lean or too rich for cali, and the pcm dont care! how to make heads or tails of a situation, when cali is making up laws out its a--. when did cali ever produce a car? does swortzaneger know how to program a car, or pull a wrench. no. just point the finger. i feel for ya man!

 

[B-300]

The difference in CA. emissions started in 1965, the first requirement was PCV back then. As long as your within limits and haven't tampered with things it's no problem. And if your ~75 or older no test is required.

 

[Hylander]

California smog laws do Suck.
Now their trying to pass a law that Motorcycles have to pass a smog test