1998 Mercury Mystique Idle will very up and down causing st

1998 MERCURY MYSTIQUE
147,000 MILES • 6 CYL • FWD • AUTOMATIC
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PAULDH
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Car shows check engine light I had it checked and it shows only oxyegen sensor problem.I have not seen an oxyegen sensor cause this kind of problem.I am thinking throttle position sensor.what are your thoughts on this. Also once the car warms up the idle will smooth out. Thank you for time.
Feb 17, 2010 at 3:28 PM
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