The fuel cut of is on the pump it works via the engine vacume pump. check the pipes to the fuel pump for splits also behind the ignition switch.It gets its supply from the pipe to the brake servo.The plunger on the pump is normally the problem.
Raz
December 2013
Thanks for the info ACD
will check it out in the new year
and let you know
Best wishes
coffeeman
December 2013
quite an old van this so it may have a fuel cut of valve on the fuel pump,sorry not sure but if it has check you are getting voltage to it and it may be removable to check the ball/valve isn`t sticking/seized.