Device to attach a fuel return line to a fuel injector and device to suction fuel from a fuel injector

The device relates to a device to suction fuel from a fuel injector and a device to attach a fuel return line to a fuel injector with a C-shaped main body (28) partially encircling the fuel injector having two retaining arms (16,18), wherein the retaining arms abut the fuel injector and grip it from the back at least to a small degree, with a connector coacting with a drain passage of the fuel injector and at least one connecting fitting for the fuel return line. A device for suctioning fuel from a fuel injector using a venturi pump is also proposed.