Compression Ignition Addict
Join Date: Jun 2011
Location: Colorado Springs
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read the stickies here in the forum and you will find all you need...
The wrench light is telling you the truck is in "limp home" mode where the power is reduced due to over temp on the oil or coolant. Do you have separate gauges for EOT, ECT? You need them. The gauges on the dash are actually more of an idiot light. They stay in one spot until you are on the verge of shelling the engine and then they move into the red when it is too late.
The reason for going over temp on EOT or ECT are many and you won't know the root cause until you install some gauges (or an Edge insght or other smartphone based app) to monitor the temperature. Could be radiator, water pump, degas cap, dirty system, oil cooler, head gaskets, etc...
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