Thanks for the info Philip, appreciated.

I have looked at the injector status this morning and all are showing zero, however, the correction value is 'jammed' at +2.99 and does not vary like the others do.

I have taken the head loom out and checked it over and it seems to be fine. Each injector measures 0.4 ohms. I have scoped the individual injector currents and all appear to be a correct profile and drawing just over 18A peak current then modulated at around 12.5A.

Just a thought - could the twin-pump failing cause this issue i.e fuel starvation (although i'd expect all injector values to be high if this were the case?)

If it is an injector i may kick this one over to a VAG specialist as i've got enough problems already and VAG isnt my speciality!