I have a 94 gt and it recently began having trouble starting. it acts like the batery is dead when it has a full charge and even with new batteries. I have checked the fuse box for grounds and even replaced the starter, coil, and starter cable. no mods or excessive sound systems. I even tightend the ground wires as a check. somone said something about a cam sensor in another post. what is its job and is that a possiblity? any help out there?