hi all ive recently bought a fiesta st 07 plate an driving around is fine an smooth but when coming to a stop and putting the clutch in the revs seem to raise then drop raise again an then when you come to a complete stop they level out at about 900 revs where it stays and seems normal its just the raise rev im concerned about is this a normal thing with fords or is it going to have a problem any help appriceated
