hi my car.1999,2.0 liter voyager,petrol will drive and start lovely.when starting revs are a bit high,just over 1000 or so.when warm and driving along it ha s loads of power but when take my foot of accelerator it will start to judder,as if it doesn't like idling along and want to go fast. god this will not propably not make sense but please try to help before wife goes nuts. greg