Smog Test, Can't pass cruise CO Options

[jaminM3]

I have searched the forum and I can't find any info on getting your car to pass the smog test?

I have a '74 with a 2.0. It passed in fall of '09 and I drove it to RRC. The only thing I have done since then is relocate the gas pump to the front. This has successfully stopped the vapor locking issue.

Does somebody out there now what I need to do to adjust the FI? It passes the idle test fine but the cruising test fails for Carbon Monoxide. You can smell it too. I think it is running pretty rich.

(IMG:style_emoticons/default/confused24.gif)

[jaminM3]

It says the CO% standard is 5%, mine tested 7.36% and 10.4% last fall when I tried it the first time. I brought it to a local mechanic to install the 911 front suspension and brakes and had him look at the tune. That is why it went down.

It passed the year before and I only drove it like a thousand miles.
You can smell it, there is something wrong with the tune.

[ArtechnikA]

It says the CO% standard is 5%, mine tested 7.36% and 10.4% last fall

Are you running premium gas?
Stop.
run the lowest octane that will prevent detonation, at least for the duration of the test.
Higher octane == more resistance to burning.
unburned fuel == high CO.