Check engine light has been on for 2 yrs

Autozone will read the check engine codes for free and then you will have more information on resolving the rich running condition at start-up. Post all the codes you get for more assistance. Have you checked the condition of your air filter, checked for vacuum leaks, and tried some of the (every 5,000 mile fuel injector cleaner)?

I do own a S2000(Best Car I've ever owned!), but it would be a little difficult for us to work on it. What are the DTC's?

Did you install any aftermarket parts on your motor???

How many miles on it? Post code #s for further assistance.