After sitting for a week in below zero temps. and jumpstarting because batteries were totally wiped my 07' F-350 ran fine but lost all turbo psi and power 150 miles down the road. Stopped and fueled up added Diesel Kleen ( did not shut motor off ) still no power. Shut down engine for about an hour turbo ran fine for a few miles after then lost psi again for the rest of the trip. Today ran fine all day with no loss around town. No engine codes. No idea?