Ok just an update for future reference if anyone gets the same issue.
The code came back again and it got really bad.
I done a few checks
1. I unbolted the fuel rail and took it out with the injectors and fuel supply line still attached and cranked the engine, injector for cylinder 3 (not number 2 like the reader said, unless cylinder 1 is gearbox side) wasnt working.
2. swapped the dud injector with the one next to it and it still wasnt working but cylinder 3 was now firing so not a wiring problem.
So turns out to be a fooyunged injector, the car got really bad, almost like it was on 2 cylinders but this was due to the o2 sensor getting an under reading of the amount of fuel so it richened the mixture, but ofcourse only on 3 cylinders as one didnt work, so the 3 cylinders were overfuelling causing it to run badly.
Replaced the injector and all is fine again. It cost me £44 inc VAT and is genuine renault.
Thanks to those who helped to the best they could, im selling the car now and looking at an E36 M3