So send them in for professional servicing. I recommend getting and sending in 2 or 3 extra injectors so you can put together a matched set when you get them back. Toyota's specs allow for a significant disparity in flow rates from one to the next... IMO it should be less than a couple percent. RC Engineering (
www.rceng.com) and Cruizin Performance (
www.cruzinperformance.com) are two which I have had good experiences with; during racing season RC tends to have a longer turnaround time.