My name is Kace and I drive a 2007 infiniti fx35. My car has been driven in over a month due to having a wheel bearing replaced. I had that fixed and I went to test drive it. When I cranked the car up it's idling around 2000 rpm . It wasn't doing this before I parked it for that month. Why is it idling like that ? It stays idling the whole time I drive it somewhere.