So I think my diverter valve is making a whistling noise, only under boost. Not 100% sure is the DV, but it certainly seems to be the cause. It only makes the whistle under load above 3k rpm, roughly about the time the diverter valve vents excess boost. It literally sounds like a coach's whistle. Also I had a random epc light the other day followed by no boost. I cycled the ignition off and back on and the light was gone and everything normal again (except for whistle). I scanned for codes but none were stored. The whistle just started 100 miles ago, definitely wasn't there before. Really hoping its not turbo, but hey, JB4 for life, warranty intact. If its just the diverter valve I'll spare myself the trouble and fix it myself. I tried searching the interwebz but couldn't find anything regarding this platform, only that the diverter valves are solid now. Anyone experienced this?