That tube you circled is part of the intake, specifically inside it is a DME controlled resonance flap. The resonance flap allows the length of the intake air track to be optimized over a broader range of speed. If the hissing sound is coming from there, check the solenoid valve as it activates a vacuum servo that opens and close the resonance flap. (its located about the middle of that tube)
Last edited by boxs2000; 04-22-2008 at 08:21 PM.
|