My 1992 lincol towncar will not start without a boost. However once the battery is charched all is well untill i turn off the car. In the middle of the day or night the car starts on it's own without

Wait a second, let me be sure I have this straight. Do you mean that, say, it starts up and runs without you there? Like you get up in the morning and your car is running? But you start off by saying it won't start without a boost..like a jump start from another car? I would like to help but I am confused here. But it does not sound like a starter problem, if the starter motor engages all by itself by some fault in the electrical system, it may crank but it won't run without the ignition on. Please elaborate?