The fuel pressure regulator (fuel control actuator) in the high-pressure pump controls rail pressure. The injectors have a hollow check ball that holds rail pressure until the fuel solenoid is actuated by the ECM, this allows the check ball to rise off its’ seat and an injection to take place. If the injector connector tubes, where they seat into the injectors, leak or the check ball in the injector is leaking or the high pressure limit valve then it will not build enough rail pressure to start the engine. It takes approximately 4000 PSI rail pressure for starting. The fuel system contains high pressure fuel up to 26,000 PSI. 2007 dodge 5.9 cummins rear main seal plus#ĭo Not use you fingers to find leaks! High pressure fuel entering your bloodstream may result in amputation or loss of life.2007 dodge 5.9 cummins rear main seal upgrade#.2007 dodge 5.9 cummins rear main seal install#.
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