Injector buzz!!!

so im geting a Humm from my injectors/rail....which is what i believe to be the reason my car isnt starting now....i first thought my cylinder was loading up with fuel.I have to take the hybrid off to get to the plugs. but with the injectors and rail out of the intake the buzz is still present but the injector isnt spraying so it may not be stuck open.i have my harness grounded to my intake bolt(it is making a good ground checked it many times) which i believe it was on the firewall stock.....Im still lost as too what is going on here.....these are used injectors I have never seen them run.......so is there a way to have a parts store test them out or where can i get a new ones....

P.s with the ign on and the F/P on they buzz!!!

It sonds like a transformer buzz coming from the #2 injector....i took them all out with rail attatched and they are all hitting as they should. it doesnt do it all the time but when the key is on with the F/P on it will sometimes......I just got back in from taking it out for the first time. It runs very strong and boost comes on quick and it pull HARD at only 6PSI.