Fuel pump cut off

[hirstyt4]

Hi all

What would make my fuel pump cut off at 0.5 bar of boost


I have had a dying problem with the T4 now for a few month now. When i hit .5bar of boost the car will die and stutter. i have just put my son (19 year old ) in the back with the seats up and the tank showing with a long bar listening to the pump. i drove down the road and put my foot down and and the pump cut off?? then when i let off it came back on?????. Tried this about 4 times and the same all the time

HELP please is it the pump going down or a bigger problem

Mark