Ever swap injectors?(4.7)

[paroxysym]

My 4.7 liter seems to run better on the 91 octane especially with the 91 octane tune on the flashpaq. If I don't run that tune the transmission shifts weird due to the fat meats I'm Rollin on

same here... she shifts so much crisper and runs so much smoother on the 91 tune with 91 in the tank.

yes my mechanic is a bit on the older side.