Originally posted by Kremithefrog:
Possible vacuum leak, PITA to track down... and I've heard about intake manifold gasket leaks on duratecs.



Now that you mention it, last week the snow began to melt and when I parked my car in the garage one night, I heard a hissing noise. I figured it was my front left tire because it had a very slow leak. But looking back, at the rate it was hissing, my tire would have been flat by morning. This hissing happened on two occasions, both wet road conditions.

Is it possible that a hose is cracked or disconnected and the water created the noise? Would a leaky intake gasket make the noise? My tire will stay aired up for a couple days before it goes flat (I need to fix it soon), so I suppose it wasn't the tire.