Ford 6.0L Diesel IPR Controller When a hard start or no start condition exists, the 6764 from OTC allows a technician to close the Injector Pressure Regulator in order to determine if proper injector control pressure is achieved and sustained for the starting process.. Tactile On/Off switch with LED confirming power to the tool and signal to the Injector Pressure Regulator. Permits a quick initial diagnosis of the pressure regulator when a hard start-no start situation exists.. Used in conjunction with any scan tool capable of reading fuel pressure on 6.0L Ford Diesel. 6764 No -