I've scanned the car and there are 0 misfires. KR is at zero as well. But everytime I get above 5000rpm, it stumbles like a miss. I have an SES light for EGR flow inadequate.....but that has nothing to do with it.

Anyone have any ideas?

 

Mine did the same thing after 4500, a spark plug was loose, but that might have shown up on your scan? Anyway its a thought, you could also try some carb cleaner maybe..

 

i would say try changinf ur plugs, thats what it was for me...i also had no missfires on my scan

 

Mine was oil getting on the Opti sensor.