... and injector back leakage, to check the CR injector with either solenoid or piezo technol CRI-3000, the repair tester ... or piezo actuator of the injector.Adjustable frequency and pulse width for injector driving signal.Short circuit protection ... and piezo driving signals.Rich accessories, ready to test Bosch, Denso, Delphi and Siemens injectors. CRI-3000 for Solenoid & Piezo Injector Common Rail Tester ...