i just got a new tune after my new turbo set up and made 360 pump gas at 24psi on an mustang dyno. but now when get up near 5000 or 5500 rpms i feel a cut back almost like a misfire but its not that, i was wonderin if this could cause im runnin the stock injectors cause my tuner told to get bigger ones and i could make more power

 

Do you have the knock cel enable through tephra mods ? I would say its knocking. It might not be knock but the knock sensor could be picking up noise under the hood.

 

Is your ECU pulling a code? You might want to pull your plugs and inspect, also regap to 0.22...

 

Yea, I had the same problem before...
It ended up being the plugs. And I agree with fedevo, gap them to .22

 

gap to .024"
.22 is almost 1/4"

 

ok guys ill try that thanks for the help