won't stay running

we have a 99 saturn sl2, dohc, not to long ago saw a good price on gas and put 10 dollars in, got less then a block away from the station and it stalled, had it towed home, it runs for 15 minutes and shuts off. After about a half hour it starts again for another 15 minutes and will stall again, have replaced the fuel pump and fuel filter, but it continues to do it. A diagnostic code come up as p1599. What does this code mean? Can anyone help me get this fixed? Please?

DTC P1599 Engine Stall or Near Stall Detected

Interesting. I suppose its possible you got a bad tank of gas, especially if the tanks were being filled as you were filling your car.

Replace the ECTS. This will ensure proper air/fuel is being used. Also, during the no start situations, is there spark at the coil towers? Does the pump prime?