Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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Originally Posted by Aerospace_ITGuy
The regulator in the alternator is intentionally timed to not start charging until after the glow plug cycle because the load of the glow plugs would toast the alternator.
I have seen people make that statement before, but it simply is not true. Put a clamp-on ammeter on the alternator and crank her up. It puts out 80 amps (if a stock alternator) right from the get go. The reason for the low voltage is the glowplugs are pulling 150 amps and drawing the voltage down even with the alternator trying to keep up.
2005 F-250 6.0L, crew cab, long bed 4x4
completed in 2011: STC update, new IPR, BPD EGR cooler, oil cooler rebuild, 6.4 banjo bolts, blue spring update, SCT X3, Insight CTS, 58V FICM, CCV Mod, DIY coolant filter (now gone), refinished turbo
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2012: ARP headstuds, OEM gaskets, standpipes and dummy plugs
2015: XDP coolant filter