i have a 98 accord. while the engine is off and press the break and hold it, i hear a almost squeaking noise comming from this hose top/near the break fluid res. this hose runs into the engine manifold. i can feel the vibration of the hose to determine that the noiise is coming from there. what is this hose for and should it be making that noise? another noise is i put the key in and turn it to the on position and then i take out the key and there is this depressurising noise like a turbo swish but no so loud coming from that area of the break res. what is this noise? thanks