ONLYA6 Posted May 15, 2013 Report Share Posted May 15, 2013 This started last week after I did a 70-140 pull on the interstate. It doesn't sound mechanical. I've narrowed it down to possibly being wastegate related. Under light load if I listen closely I can hear the normal noise of the turbos spooling but as soon as I dip into the throttle to a point where the wastegates would be moderating the boost I hear the high pitched "whistle". It's quite noticeable in the cabin - as if someone is under the dash, well, blowing a whistle. Performance and everything is still as it should be - no CEL. I can drive normally and not hear it for days if I'm not applying enough throttle to reach full boost. I'm going to get underneith here this weekend and take a look at everything. Possibly an air leak and as air is passing by it is creating a resonance to cause this noise. Figured I would post up and see if anyone else experienced anything similar. Possibly a common connection that becomes loose? Quote Link to comment Share on other sites More sharing options...
tss Posted May 15, 2013 Report Share Posted May 15, 2013 do you have any CAI? Quote Link to comment Share on other sites More sharing options...
Crash712us Posted May 16, 2013 Report Share Posted May 16, 2013 I'd say check for leaks. Quote Link to comment Share on other sites More sharing options...
Boggus Posted May 16, 2013 Report Share Posted May 16, 2013 Sounds like a vacuum leak Quote Link to comment Share on other sites More sharing options...
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