Grinding Sound!!!!

I have a question when I am driving or when the car is parked their is a grinding sound that is coming from fuel injector valves or back of the engine everytime I rev the engine to 4 to 5k. Can someone tell me what the problem is I have a Integra GSR. Thx

I saw an error in my post, when I give the engine has when the car is neutral when it reached 4000 to 5000 rpms their is a grinding sound? Can someoen give an idea what it could be. thx