Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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TheICP reading look OK, but what you need to know is the corresponding IPR valve%. Is the IPR is 85% closed to hold that amount of ICP, then you have a big leak somewhere. If (at warm idle) you have 580 ICP and IPR is 18 or 22%, you likely do not have a high pressure leak.
Lack of power could be many things. Fuel filters changed? fuel pressure OK? turbo vanes sticking? EGR sticking open?
Need to look at other parameters and provide other symptoms to hope to get any diagnosis. Is it smoking under load? What color, how does it smell, dewleted EGR? any other recent work? maintenance history, does it hot or cold or both?
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
2012: ARP headstuds, OEM gaskets, standpipes and dummy plugs
2015: XDP coolant filter