Sometimes when I go to start my car, it makes this noise almost like belts are slipping against eachother. Stuff turns on and something seems to be trying to turn over, but it doesn't. I'll let the car sit a second in the 'ON' position then turn the key. So far this seems to happen after playing my system for a few seconds without the car on (300watt amp). Is it the alternator or starter? If it helps, I had just finished washing the car and there was alot of moisture in the outside air.