Opening Pressure
- Pump pressure up slowly to note opening pressure. Nozzle opening pressure is 1706 psi (120 kg/cm2 ) for I-Mark models, on P'UP models 1493 psi (105 kg/cm2 ).
- Check injector nozzles for leakage by installing in tester and maintaining 284 psi (20 kg/cm2 ) pressure. If any leakage is evident, injector must be cleaned or replaced.