[Mr 5 0]

Your high CO (carbon monoxide) emissions are probably due to not enough air mixing with the fuel. Try a new air filter (or clean a K&N) and replace the PCV and screen. You may also have a leaking injector(s) or a bad sensor: (coolant, throttle position). At that close to the maximum you'll probably fail the next test so I would attempt to find and try to minimize the CO levels you're at now. A new air filter may do it.