My Crossfire will start, and shut down, and then wont start. It doesn't turn over, no clicking, nothing. All the lights and electronics work fine. If I let it sit for 8 hours or more, the battery completelly discharges. I'll charge the battery, and it starts fine and runs for days , and it will do this again. So far, I've replaced the following, but the problem persists. It has shut down on me even while driving, but for the most part will do it when I try to start it.

• Replaced the battery
• Replaced the cam sensor
• Replaced the crank sensor

Any ideas?