ive just bought a 1994 mreg valver which has a strange idle prob. its hard to start on cold mornings and once it fires up the revs either sit really low or stay on 1500-2000revs for about a minute or so.first thought cold start valve but looking at the history thats already been changed.it even does it sumtimes when the cars hot aswell! also the revs take a long time to drop when you change gear guess this is why im only getting about 23mpg out of it and as ive owned one b4 i know there good for about 30-35mpg.im sure its nothing serious as the cars only done 58k. maybe its the isv? any advise would be great.
cheers.