Clio Mk 3 1.2 Petrol Throttle Pedal

[Alvin]

I've got this late Mk 3 2012 it showed codes for throttle pedal so changed it then it showed codes for throttle body so changed it but now it alternating between these same 2 faults,Firstly it says check emissions,EML on once cleared drives a few miles then Check Injection with NO EML but won't rev up or hardly move switch ignition on/off anits OK for a few more miles-Anyone any ideas?Thanks