Alfa Romeo engine chokes and does not work

Hello following alfa Romeo 159 2.4 ca 260 ps bj 06 230tsd km Problems as direction work drive the engine would go out without any clues when I tried to start no chance he wurgts. As if he was starting but he wurgt as if he did not get fuel no chance according to workshop Hort man einen klacker if you tried to start the car what could lie ?? Werkstat has also tried to spray brakereinger pure also none.