Toyota Repair: Toyota Camry mystery, toyota camry, toyota dealer

Question
I have a 92 Camry that cuts off while driving. try starting it back up nothing comes on even warning lights as if battery is completely DEAD. Wait an hour or two car will start up and run fine for hours, days, or a week until it cuts off again.I changed distributor and cap, fuel pump, timing belt and all.Toyota was unable to diagnose the problem because car never cut off on them for the three days they had it running. The chk engin light never comes on during or after. Please help me with this because the car runs TOO!!! good to junk. Thank You.

Answer
I would recommend you leave it at the toyota dealer until they experience the same problem, I have no past occurences of this type of problem, since when this happens the entire electrical system seems to go dead would indicate a power supply problem from the battery to the car's electrical system.