Intermitent fuel pump issue?

Anybody ever heard or such a thing? Was out just motoring around when the motor starts to run a little rough and dies. Won't restart. Pull the spark arrestor and crank but no gas is coming out of the injectors. I can hear the fuel pump trying to prime everytime I key the ignition. There is the fuel pump on the side of the motor and there is something with wires going into it where the gas lines go in on the on the rear of the throttle body. (MPI related I assume) Is there another fuel pump in the tank? Had it in to the dealer when it first did and they couldn't find anything wrong. Sure enough works fine for another year or so and then it does it again. 3/4 tank of gas in it. 02 Supra Launch DD with Indmar 320 (MPI).