So I've now reset the ECU, and still haven't had any luck. So I phoned up Fiat they say for a Y reg Punto ELX it sounds like a problem with the Lambda probe, as this is a common failure of them.

Do any of you guys agree, or have you heard of this before?

I disconnected the Lambda probe and the running was no different, does this suggest that this could be where the fault is?

Thanks in advance for your help gys.