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New Sound

Messages
454
Likes
123
Location
Kansas City
#1
2015
18,5XX miles

The other day I thought I heard a new noise so I've been driving around listening for it again and have heard it 4 times in 3 days. When lifting off of part throttle to shift, instead of the just the normal faint sound of pressure releasing from the intake tract, I also hear a faint chuffled chirping sound, kinda like a bird maybe? Sounds similar to a BOV. Any thoughts?
 


Messages
259
Likes
59
Location
SoCal
#3
It's the stock bypass valve. It will probably continue to chirp forever. My chirp came on around 12K miles and didn't stop until I installed a mechanical BOV.
 




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