Not to pee on your parade, but we had a problem with our '86 Mercury Gran Marquis. It basically wouldn't start, for no apparant reason. Took it to the dealer and they replaced the PCM (powertrain control module). After that it ran BEAUTIFULLY for two weeks. It had some idle and stumbling problems and was a little unresponsive in acceleration before the PCM was replaced. It was running so well I actually was starting to think of spending some money on the car getting it really fixed up ( it had almost 200K on it). After two weeks of running almost like it did when it was brand new, it died again. It was basically my Dad's car and when it died again he said he wasn't going to spend $400 on the car every two weeks. We got someone to tow the car away as junk.
Doesn't mean it will happen to you, Keep us posted as to how things turn out (as time goes by). I'm just curious.