Assuming your injectors are the type they work with, you might check with this outfit regarding a professional clean and calibrate of your injectors.

http://www.cruzinperformance.com/

I believe their prices are competitive with DIY after considering your time and materials and the potential uncertainty of results. Injectors are a fairly high precision part. Small errors made or differences in how they are cleaned could greatly affect the running of your car.

Just a thought...

230/8