Maybe im just being paranoid but thought I would ask. When you depress the gas and the rpm start to go up I noticed at around 2k I hear like a sigh or a pssss sound from under the hood. I know this is around where the sc kicks on so I am just curious if its a normal noise. I also hear it other times if im idling through say a parking lot. The car is running very smooth, but seems not to get up like it used to, or it could be me just too paranoid to step on it too hard.