[Welton]

Thanks Funky, no nothing has been changed at all, I can't hear any leaks, there's no oil leaks from the Intercooler or piping but yes I did think about a smoke test, luckily I have a good garage I use right next door at work.

Changed the oil on Saturday so that gave me a good view of all the hoses and pipes. I even gave the wastegate actuator rod a wiggle and it felt nice and springy.

This might sound silly but it's almost like the exhaust is blocked and like I have a different fuel map on the car although if boost is down by 50% I guess it's never going to be right. Having driven this car every day for 10 years I'm sensitive to even the smallest changes.