If you have no fuel pressure your car will die, period. I had it happen to me on the freeway, I started losing fuel pressure and the car steadily started slowing down, once it reached 0 the car died and that was it.
As far as what the problem is, I'd check out the sender/wires, check to see if everything is nice and snug on the sender and on the back of the gauge.
As far as what the problem is, I'd check out the sender/wires, check to see if everything is nice and snug on the sender and on the back of the gauge.