What causes a clunking noise when decelerating? The car also goes by itself. on 2002 Ford Taurus

considering buying this for my sister but don't want any major problems Also, could the idle be set too high? When you take your foot off the gas, the car still keeps going instead of slowing down.

by in Fresno, CA on August 10, 2012
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1 answer
ANSWER by , August 12, 2012
you could have a tps problem take to a shop and have scan tested