Does the voltage bounce up and down while its surging? Might be the FICM.
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The 6.0l motor has surpassed Hot Chicks as the greatest Money reducing Agent known to Mankind.
2004 F-250 Lariat late build 4X4 CC/LB auto,fully loaded with sunroof, power slider and backup sensors

, White with 12" ICON lift, 6 superduty valved bilsteins, flip steering, 38" MTZs on 20x12 chrome Fuel Hostage wheels

, stock gears, superlift truspeed, fumoto, high idle mod, large case high amp alternator, floating traction bars, airraid intake with elbow, 4" turbo back, studded, powerslots with hawk pads, billet grill, 55 watt HIDs 6000k heads and fogs, clear corners, 7" Eclipse AVN6620BT NAV w/ back up camera, massive JL stereo 300/4 and 500/1, 2 12s behind back seat

, amp research steps, sirius, '08 diff cover, redhead steering box,

, coolant filter kit, hush panels and door seal mod, quad pod with boost, EGT, water temp, and fuel pressure gauges