Crs-iii high pressure common rail pump tester can detect Bosch, Denso, Delphi, Siemens and other high pressure common rail pump testers; The connecting harness can be configured to match the above high-pressure pump metering unit, providing 14V 28V and other driving current. The tester drives the pump solenoid valve to work, and the oil pump test bench provides power. It can detect the pressure and oil volume of the idle speed medium speed main spray seal of the high-pressure common rail pump. The pulse width pressure and current of the equipment can be calibrated and adjusted according to the needs of users; The operation is simple and easy to learn, suitable for maintenance and detection of high-pressure common rail pump units.