Assuming you aren't talking about the wastegate flutter often heard after installing an aftermarket downpipe; id say your turbocharger is on its way out. Any white smoke coming from the turbo area?
This is a discussion on Turbo Problems.. HeLP within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; My Turbo has just recently started to have a high pitch whistle to it when it running at 3k to ...
My Turbo has just recently started to have a high pitch whistle to it when it running at 3k to 4k RPM... Its happening in every gear... Not sure what going on with it .. Any ideas?
With only 22,500 miles on the car, your turbo should be fine. However, there is a TSB on an oil line filter that could get clogged and cause premature turbo failure in your car. Doesn't happen to many people, but it does happen, hence the TSB.
Past Subies - '11 STI Limited stage 1+ and '04 STi stage 2+
'13 Wrangler Rubicon - custom front bumper w/12k lb winch & off-road lights, skid plates, diff guards, etc.
'04 Porsche 911 Turbo GT2 clone 600 HP/TQ
'77 F-150 heavily modded for off-roading
I do want to say thanks for the help.. both of you.. THANKS