Checking the injectors for leaks
1. It is produced on a device for testing sprayers.
2. Install the nozzle on the device and create a pressure of 2.0 MPa below the nozzle opening pressure.
3. If within 10 seconds no fuel appears in the form of a falling drop on the protruding part of the atomizer around the needle, the atomizer socket is sealed
4. If the spray nozzle is slightly worn, its protrusion will be slightly moistened without forming a drop.
(The material was copied from an information website: fordbook)