Not sure if its the tune or the truck everything was ok for over a year. I have been running it on level 2. But oince gas prices dropped i tried level 3 seemed ok but on the highway seemed to cutout here and there . Anyone else have simular problems? I was able to borrowed fords scan PDS for a road test. It does't seem to be any one cylinder missing. I am thinking spark plugs After two tanks of 93 0ctane I set it back to level 2 and all seems to be fine?

 

How many miles on the fuel filter? I ran Level 3 for about 35,000 miles with never a stutter. I now have custome tunes and no problems. I changed my plugs at 65,500 miles and they still looked new.

 

8k on the filter

 

Should be fine then, unless you got some bad gas. That has happened to a few guys.