I just bought a 2014 Stx 4x4 with a 5.0 with 79k on it. It's had a slight stumble on very light acceleration, but nothing under a load. Code has set twice now. Since it was due for them, went ahead and replaced plugs. I swapped the coil on number 8 and seven to see if the code followed the coil., but it's still on 8. I haven't checked compression or anything else, was just wondering if there was a common issue anyone had run into? Thanks

 

check compression going through exact same thing right now , read the post i will be posting shortly