Any ideas what this could be please?

[Nino]

Stick with OEM unless you plan you go Stage 2 then I would recommend Forge only.

[Norwichdaz]

Ok, just using it almost as a daily tbf so won't be staging it and done 155k tbf...

Well, was about to come and say all running well since had car back this morning, and before had the pcv,plugs and coil it looked more like it was minus 10 outside with the exhaust/steam out the exhaust but now there's none of that and a tiny bit from the exhaust that u can see so thought, nice sorted.

But the "blowing noise is still there on decel" and as it was at idle nothing wrong in the revs , nice and settled, but u get a little putt, few seconds later putt...

And the ecl light flashed up 🙄🙄...

[Nino]

It never rains does it - You might have a leak somewhere between the turbo and exshuast.

[Norwichdaz]

Yeh i know 

Found some stuff about wastegate failure? And found this video ( u can hear the sound at the start)

Which does sound quite similar to my original video tbh.

The clip he talks about tho, looks like fits onto an external one I thought mk 6 turbos have them internally so surely the clip wouldnt then work.

https://youtu.be/211EPtuQ158?si=GfI3JOIqNHfg13ra

[Nino]

its possible, personally if I was you, as long as you are not;
- Losing oil
- Losing coolant
- Blowing lots of smoke
- Losing boost
- Have horrible sounds from the engine

I would enjoy your car over the Christmas period then get it booked in the new year to a specailist.

Where abouts are you located?