Mga sirs, ask ko lang po how to adjust the air selection lever of the Mitsu. Adventure. My '10 GLS Sport tended to have a whirring/whining sound when running at high speeds (>100 kph). I discovered the cause recently: it was the lower lever adjuster that tended to move by itself to the middle thus letting outside air in. And when the lever is at the left most (closed circulation) position, the whirring/whining sound is there. If the lever is moved a few millimeters to the right, the sound disappears, but then again, the lever by itself moves further to the middle, letting outside air in. Is there a way to fix the problem DIY style? Can i have the recirculated position without the whirring sound at high speed? Can I open the whole section to tighten whatever needs to be tightened? How? Dadalhin ko sana sa casa pero surely toxic yun so ako na lang.