Join Date: Feb 2011
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Your first problem is most likely a FICM on the way out. But, before you commit to that, make sure your batteries test out good and make sure your alternator is putting out at least 12 volts. Anything above 12 volts is even better. If your alternator is questionable, check with Ed at FICM Repair.com, he's the man to talk to, both with FICM repair and charging issues.
The turbo could be related to the above issues? I just had mine apart on my 06 w/180k on it, and it wasn't nearly as dirty as I thought it would be. But, a good cleaning couldn't hurt. Also, I know there are pros and cons, but if your not in an emission legal state, open that dude up and get rid of the converter and muffler. Your turbo will spool some faster and dump the heat without the bottle neck of the converter and muffler.
Your other issue with oil and coolant temp sure seems like an oil cooler that is getting plugged. But, while towing, your numbers are going to be higher due to load. Make a longer, level, unloaded run and see what you come up with. Did you actually replace your thermostat during the flush? Thats a quick way to see if your coolant temp fluctuations are thermostat related.
2006 F250 Lariat Fx4 CC SWB, BPD EGR Cooler, Coolant Filter, Blue Spring Upgrade, FICM Repair.com Atlas Tune, 4" exhaust all the way back, 2014 F250 Platinum Tires & Wheels, otherwise bone stock!