Emissions Test Failed - Help?

[John Gourley]

> I think high hydrocarbons and CO indicate a rich mixture and/or
> incomplete combustion.
>

that is a good description..........the high CO is a overly rich mixture.
high hydrocarbons indicate unignited fuel mixture ....which is another way
of saying incomplete combustion :)
a couple of the common things I have run into with high HC is a bad spark or
a vacuum leak

John Gourley