My '99 has nothing after sitting for a week or two. I replaced the batteries and the alternator and it still does it. It will hold a charge after I get the batteries charged up, but if it sits awhile it is completely dead. I had an intake code and was wondering if the intake heater could be causing this. I think I read that somewhere on the Internet. Just wondering if anyone else has had this problem? If not, what else could it be?