Low Fuel Rail Pressure at start up Long crank

F350eightyAM

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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

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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.
 

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