Fuel Injector Problem

I had my fuel injectors flushed with the Motorvac system yesterday because I was noticing hesitation in my 95's acceleration. When I got back in the car after it was finished, I instantly noticed that the injectors make quite a bit of noise now. It's like a high picture wirring noise and it intensifies when you rev the car in park. You can't hear it when driving due to road noise, but I'm worried I've screwed up here. Was doing this service a bad idea? Is this a normal temporary thing that will go away when the car is driven a bit? Should I try using a fuel additive injection cleaner to solve this? I also had the throttle body cleaned at the same time.

-Thanks

I think I read the redline website for fuel additaves address this. REad the tech info. I'm gonna pick me up some to clean the injectors. Hope ur problems' not mechanical.