Common Rail Pump and Injector Tester: BOSCH CP1,CP2,CP3,DELPHI,SIEMENS,DENSO HP2 AND HP3. ... /55kw etc.. The function of the common rail pump and injector tester for CR high pressure pumps is to provide the desired ... under the driving signals by the tester.* To test injector spray atomization, To connect a CR injector to a high pressure fuel source ...