Check your timing once car is hot s/b 15 degrees. Egg smell is usually bad cats. Do what Medallion said and do 6 p's. Also do the heated o2 sensor test, they should bounce from lean to rich very often @ 2k rpm's. Look in the engine bay for corroded connectors and clean as many as u can, especially injectors, cas, maf and ptu. Injectors should ohm out between 10-14 ohms... anything else they need fixing. Good luck!