Sounds like your fuel mixture is way rich. I have the same car and same engine. I just went through hell with the fuel system and after a few months I've nailed it down.
First thing I would do is get the car nice and warm. Drive it around until the exhaust gets hot so the oxygen sensor can start reading. Then adjust the fuel/air adjustment:
http://www.landiss.com/mixture.htm
If you have a multimeter that has a duty cycle feature, adjust the system until it reaches about 47%-49%. That's the optimum percentage. Saying that you'll notice a slight change in the behavior of the car would be an understatement.