I would welcome any advice re: 3.0V6 CDTi with 30,000 miles. 55 Plate. Between 1400 and 2000 revs in any gear the engine feels as if is is missing it gives the effect of driving over cobbles. I have had the car 2 months it has spent 6 days in VX dealers they say they cannot find anything wrong and suggest I change my driving style to avoid that rev band. No codes showing up and after talking to VX they say it may be a characteristic of the vehicle. They have updated software on EMS and replaced a sensor which produced small improvement for a short time but now as bad as ever. I have a three year dealeship warranty but that is not much good if they say there is nothing wrong. HELP!!!!!!