Well me and three of my friends installed my system today and everything worked fine.Well i was driving home and my deck shut down and stayed off. Well when i got home it still didnt work.Than i shut off my car and left the key in and it worked. Like 30 min later i went out and started my car and it worked fine.When i was about to go home ,it shut down again. It works fine with the car off but when i turn it on,sometimes it shuts down. Also when i accelerate i hear a little hissing sound. If you guys can help me i would be very greatful.