Compression Ignition Addict
Join Date: May 2009
Location: In the country south of Covington TN.
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Rockin J, make sure the fan clutch is working. You can definitely hear them when they engage. If that's not it then it might mean the radiator core is partially plugged. That would mean a trip to the radiator shop. I don't think it's a thermostat since it behaves well unloaded but it's a remote possibility as well. Good Luck
Randy DuCharme (Radio AD5GB)
'06 F-250 FX4 A/T Super Cab short bed /w tow pkg
SCT SF3 tuner /w Gearhead Performance custom tunes. ARP head studs, EGR delete, oil cooler/drainback tube/STC coupler/blue spring/standpipe & dummy plug upgrades, ScanGauge II, Sinister diesel coolant filter, Fumoto drain valves, Stage II direct clutch and ECP solenoids.