Do you mean while you are just sitting, or when you first drive away. If the latter it could be the ABS system going thru' its startup routine (my '97 does this, but not my '98).
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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