Originally Posted by Captain Awesome

Hi guys,

So something i've never encountered before on any car has popped up this evening.
Previously, As I accelerated the boost would continue steadily pretty much until I changed gears (or redline, which I don't do), but tonight the boost goes up till about 4-5k rpm and then just stops. I used to always be able to hear the turbo at work, and still can if I change gears around 3-4k. But any higher and I don't hear anything, just engine noise. It's like the turbo just stops working once it's hit 4000rpm Please for the love of god tell me it's just a boost leak?
Has anybody had experience with this issue? Car is a stock 07 STI except for catback.

Perfect timing it's booked in for a 60,000km service at subaru tomorrow, but i'd really like a heads up or any information to know what i'm in for.

Cheers,
Chris.