Injection fault and esp lights

The car developed an issue in my last track session at FCS today. Whenever the car hit above 5000rpm it would splutter and there would be a huge power loss it would not really rev higher now it has came up with check injector and check ESP any idea what this could be?
 
Thanks only trouble is I replaced all 4 and it's still doing it. I believe it's a sensor as it's only happening when it's hot on track