is there a way to tell if injectors are any good. i pulled a mpfi swap out of a junk car and i am not sure if the injectors are good is there a way to test them or tell.

 

you could mail them to RC engineering or other companies for bench testing, but for you and me running them is the best method. unplug them one by one (the wiring) and listen for a change in the engine, it should run rougher, if it doesn't its bad.