fuel injector

my sister has a 00' grand am gt and she just bought it and oneday we checked oil and started it and heard a clicking noise in the engine not usre wut it is but i thought about my car a 91 bird le 2.0 tbi ohc and i looked at it today and started it up and hear the same cli9cking sound and i found it to be the fuel injector. could this be a bad fuel injector?

nope it's just opening and closing, heck, you can feel it doing it as well, if you touch the TB close to the injector.