1.5 dci injection test without disassembling

I have shared a method to test whether injectors, which are an important part of the fuel system of diesel vehicles, work properly. Unfortunately, the failure detection and repair process can become complicated in diesel vehicles.
With a healthy injector, the timing and amount of spray is flat, this scheme begins to deteriorate over time and problems such as jerky spraying or timing error, jerky operation in the motor, loss of performance and increase in fuel amount can occur. Even when the tillers say "the injector has voided", when the injector needs to spray, the piston stroke may occur due to the start of the fuel flow, the flow to the same point on the piston and the temperature increase due to the continuous burning there. In this case, a complete engine revision is required.
Materials needed to make our test 5 serum sets, 4 bottles of the same specifications.