Join Date: Oct 2008
Location: Fort wayne, IN
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With it being a 6.0, I would start by tracking down any oil leaks in HPOP system. Sound like the system is bleeding off pressure, then once you try to start, after a cranking period the ficm is finally seeing the min pressure of 550 and allowing the truck to start. My truck did the same thing, and although there are many places to look for a oil leak, the symptoms seem to start by long cranking time. Being an 05, I would start by looking at the STC fitting. If it has not been updated, the STC fitting will blow apart at the male/female quick disconnect (or just barely seperate like mine did) and allow the truck to fire after long crank times. Then finally one day you'll be sitting somewhere, and it will seperate all the way, and you'll be stranded.. The original design on the STC was POOR, but that just my .02.. To look for a oil leak, remove icp sensor and apply shop air, command the IPR valve closed and listen for leaks on the passenger side through the oil fill tube, driver side through the pcv tube. Or attach air through the test port on the HPOP pump itself and if it's the STC you will hear air gushing from under the cover. Hope this helps.
Lineman get it up when the lights go out!!
2006 F350 FX4 CC SB
Egr Delete, 4" straight exhaust
Quadzilla Race tuner, Full Gauges