It may be a vibrating shield on the exhaust, very common. If you have some ramps, get it up on them and feel around (when cool) to see if you can find something loose. If not, have a friend rev it up and down while you look under there for a possible loose shield.
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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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