JULIO GEE

hello i have a 94 gt drop top and im having a wierd problem...the car will die out while driving..not all the time some times it will drive fine then when i park and go to start it back up it will not start it will crank and try to start but will not kick...if i wait a few minutes it usually comes back on...i have replaced the cap and pickup coil wires plugs fuel pump, fuel filter, fuel shut off switch...if anyone has an idea im all ears....thank you