ok so i got a 2.4 automatic and when i drop down to L and launch when the car shifts from 1st to 2nd i hear a distinct PSH like a damn BOV and it only happends when im in L going from 1st to 2nd at WOT i have no idea what it could be and if its somthin i should worry about or not.

 

Moved. How-to isn't for questions.

Separately, I don't know what that noise could be other then the engine slowing down from the shift.

 

Sounds like the Intake sucking in air. My CAI does it when I switch with my 5 Speed.

 

yea i didnt realize i posted it in the how tos till after i did i ment to put it in problems area. but all my intake stuff is stock