Ande1160

I have a2008 S5 with 90k on it. Got a check engine light, had a misfire on 3 and 5. Replaced the plugs first and ran the car. If I hit 4th above 3500 rpm the light would come back on. It showed a misfire on 3 again. I replaced the coil and same thing happened. I ran fuel injector cleaner through it and it popped again. At idle and easy driving, no issues. Once I put some *** behind the throttle, get the flashing check engine light. The engine had a 60k carbon clean done on it, I'm pretty much out of great ideas and looking for some help or ideas.