Engine shutdown must pump the primer then runs

[Mrmr]

While driving I loose fuel pedal   And engine light comes on .

 I turn off engine and pump the primer then everything is fine until next time.

the Toyota dealer tried to tell me it’s my turbo motor 

im thinking more of high pressure pump as I checked the fuel line to the primer no leaks but it’s loosing it’s prime somewhere can anyone help 

2006 Hilux diesel 

[Devon Aygo]

When priming does the primer get too hard to push? If not then the primer "diaphragm" has most likely failed and by pumping you are pulling fuel up but the primer is leaking air back into the line