Take that vacuum line and, while looking at the little arm on the valve, plug it in and out and see if the arm goes up and down. Also, the valve may have a bad diaphram and is what you hear. Cap off the vacuum hose with a golf tee and see if the hiss goes away.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing.
TEMS, and some nice MODS. Sold to a friend 10/08/08.
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