89 lebaron starting problem

Hello,

I have an 89 lebaron that has a starting problem. The car runs fine but about 5 times in the past month it has died on me. Usually it will start up again between 1-5 minutes later. The engine cranks fine but will not fire. When the car has sat for a few minutes it starts up again with no hesitation. I've changed the cap/rotor, wires and plugs. Has anybody encountered a similar problem?? If so your advice would be great.

thanks
sean