My CO2 level was at 15.96 and max is 15 anyone know how to get that down

 

Are you certain it's CO² emissions and not CO emissions? I was under the impression that only the truly ****-retentive, ultra-blue states were limiting CO² emissions (like the People's Republik of Kalifornia and Mass-Hole Central). I didn't realize that Arizona had gone over the edge of sanity. CO² emissions used to be a GOOD thing, indicating complete combustion and a lack of other contaminants. Now, these states are limiting fuel consumption and engine power by reducing the limits of CO². The amount of fuel burned is the only thing that consitutes the level of CO², unless the cat converter is working at less than optimal levels. Basically, they're telling you to ride a bike.

One thing you can do is limit the WOT fuel, but then you risk going lean, burning valves and pistons, and creating more NOX emissions. Another thing you can do to get through the test lane is to limit the travel of the throttle cable Most of these guys aren't clever enough to catch that.

Was this done on a treadmill?

 

Retard your initial timing back to 0 degrees. That should work.

 

Replace the cat.

 

It was done on the rollers.

And Have a new 3" cat

They are saying that I am getting to much fuel... The funny thing is that the prior owner had unplugged the air charge temp sensor and put a resistor in the connector. I pulled the resistor and ran thru emissions again and now had jumped from a 15.96 to 19.20 and failed my hydrocarbons

 

from what i can find it can't be CO2 that is your problem, even california isn't failing for CO2 levels,..yet, quote from ca.gov site on CO2,
" %CO2: Carbon Dioxide is a colorless, odorless gas which is a byproduct of most combustion processes and also of human respiration. It is the same gas found in soda pop. High levels of CO2 in exhaust typically indicate greater engine efficiency; however, CO2 is considered a greenhouse gas that may cause global warming. High or low levels of carbon dioxide emissions are not grounds for a vehicle failing the Smog Check; the measurement is meant as a diagnostic tool for technicians."
so it must be CO.

we really need more info on this, such as, what are the other readings? what does this car have? has anything been removed? has anything been changed? any performance parts? any codes in the ECM?

high CO is running rich.
things that can cause high CO, motor running too cold, fuel pressure too high, coolant or air temp sensors not reading right leaking injectors or fuel pressure regulator, dirty motor oil, dirty air filter, air leaks in the exhaust in front of or near the O2 sensor, problems with the air injection system, MAP or MAF sensor problems, weak or bad O2 sensor, bad blowby, ECM problems.

plugging in the air temp sensor if it is good may be all you need to do to pass. with either the air or coolant temp sensor unplugged, the ECM thinks it's very cold, -40 degrees, & will run the fuel mixture way rich.

 

Yeah, Denn, that's what I was wondering as well. I haven't heard of CO² limit testing for certification yet, but it's a new year, and I don't live in CA or AZ. Never know.

 

I'm pretty sure he's really trying to talk about CO, not CO2....