As far as these problems,i cleared the codes,and my gas pedal went bad for the 4th time.I replaced it.The truck then ran fine,last weekend i put the Gryphon back into tow stage,to tow my 44ft box trailer to the track (about 8,000lbs) with 2002 F250 PowerStroke 4x4.Once it started missing and blew pure black smoke at about 750 EGT for about 30 seconds,with check engine light.About 3 miles later the light went out,no more problems with hills and EGT to 1250. I checked the codes when i got to the track,they came up 603 and 1211.I cleared them,going home with no trailer i brought the EGT to 850 the light came back on with no miss.Sunday i brought the trailer home the light came on but it still didn't miss,it still came up with the same codes.Any ideas?
