I have an 06 vin 2. Recently the truck started running rough after fueling. It then went away and returned the next day. I checked my balance rates and all are fine except #8 . It's at +9 (warm, and in park) and +12 in drive. It did throw code for cylinder 8 misfire detected. It also has a code for vane position sensor needing relearn. I ran the truck while watching the vane position and its sticking at 75% and very sporadic on what its demanding, goes for 60% to 100% right down to 0% but still stuck on 75%. Even when I shut it off it's still stuck. Is this separate problems? Or related?