Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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Does the fan run at high speed all the time? based on the work you have done, I assume you have had the truck for a while. Since you replaced the fan clutch, the flirst place I would look is the wiring to the clutch to see if something is shorted (or open) - I am not sure how the system works (i.e. signal high to run fan or connection to ground to run fan).
Also, what is your EOT? that can also be used to command the fan high (i think).
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