Engine Vibration at over 2000 RPM

[brad22482]

Hi,
I am new to NICO as I dont own Nissan or an Infiniti. However, my father is in the hospital and my mother's 2006 G35 started to experience problems. I came home from Afghanistan for emergency leave but I will be returning shortly. So I am trying to help them out while I still can. Any help you could provide would be very appreciated.
The problem is I hear a very loud vibration/almost a rattle coming from the engine bay during acceleration. It gets really bad over 2000 RPM. I used a stethoscope and it sounds like its coming from the Power steering pump. Looking at the replacement price I am not to eager to swap it out w/o confirming its the problem. Anybody have an experience like this? Could it be the idler pulley?
FYI, the belts are old and starting to crack. I hear some whining during Idle. Again, any help you could provide would be greatly appreciated. Thanks you in advance.

[sstroudwku]

Remove the drive belt and retest. You can drive it a bit without belts on it so don't worry there. If the noise is gone then you know it's not engine related but an accessory. Go from there.

[kmckis1029]

yeah start with the belt...

fluid in power steering low or old?... its kind of a pain to flush it... but that could be another thing to do before you buy a new one.