Hey all,
Sorry it's taken so long to report back - I've been away with work.
I've read through your responses and the general discussion.. in the end it was carbon build up. I still feel I was messed around by the dealership / Skoda Aus and that's being addressed. The dealership performed the clean and since then it's no longer an issue. The dealership have requested it back earlier as there's still a slight misfire. It may need new injectors but at this stage I'm happy with the way it's running.
Thanks again for the suggestions and advice.
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