Low Fuel Rail Pressure at start up Long crank

[F350eightyAM]

My truck is slow to start. The fuel rail pressure is low at first while cranking then the pressure builds up in 3-4 second into the crank then starts. Any ideas of what it could be. ??? I've had electrical issues with the alternator over charging( 16V )replaced that today.

 

[Dzchey21]

could be a number of things, High pressure fuel leak, High pressure fuel pump issue ect. Is your engine oil overfull? That would indicate a leak.

 

[F350eightyAM]

No the there is not diesel in the oil. Changed out the hfcm same results