b4bullet wrote:Hopefully someone can help me out here.
I purchased an 07 Tuned by STI wagon 2.5 weeks ago and for the last week I've noticed an odd rattle sound while boosting. I've only really noticed in in S# mode and from about 3800rpm. It doesnt do it every time, maybe 70% of the time. I've experienced pinging (detonation) in my Liberty B4 and it doesnt sound the same.
Waste gate flutter? If there is such a thing?
Not sure if it's the same on 07 Sti's but I had something that was similar on my Previous MY09 Forester XT with a stock Td04. Not always evident, better heard when boosting 3-4K rpm next to a concrete freeway wall with my window open, bit of a light rattly tappy sound but logs showed no detonation at all. Never did anything about it either.....
It may well be the actuator arm looseness , NASIOC has plenty of discussion on it, eg:
http://forums.nasioc.com/forums/showthread.php?t=425018