What is that?
Since a little while, I hear a vacuum/sucking sound only when I turn the vents off and the sound stays until I turn off the car. I think it comes from behind the intake manifold. Today I was replacing the oil pressure switch behind the manifold and I found that the two hoses connected to a single hose (circuled in blue on the picture) behind the manifold were kinda melt down and disconnect.
Is anybody here could tell me what are those hoses??
Thanks!
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