Join Date: Dec 2008
Location: Spokane WA. area
Thanked 990 Times in 755 Posts
Check your oil + coolant temp deltas on the ScanGauge and see if the oil temps are too high.
Could be turbo or exhaust leakage related too.
Is the symptom intermittent or all the time?
Does it blow black smoke when the low power is occuring?
Make sure the basics like fuel and air filters are ok.
Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)