I have a benchtop injector cleaner/tester that I use for that.
I will put the injectors in an ultrasonic bath for 5-10 min, then put it on the flow bench for 3 min to flush them with clean gas, then put them back in the cleaner, then reverse flush them.
If I ama feeling really fancy, I will do a flow test before and after the cleaning but I usually don't bother with the "before" anymore. Just run an after test with the whole set that I cleaned to make sure they are balanced.
I decided to just buy my own cleaner/tester because it was cheaper than paying for an LS set to get cleaned/tested. This is th style
I have.If you only have the 2 injectors, you could soak them in carb cleaner, use a battery to open them and blow them out with an air compressor. Do that a couple times, then clean/blow them out with fresh gas. The tbi system is fairly low pressure, so I would limit your air pressure to 12psi when blowing them out.
