I have had my cambelt changed on my 2012 Freelander 2 HSE at a independent Land Rover service centre which I have used for the last 6 years with no problem. It now seems to judder like no fuel getting to engine every so often? Took it back to service centre to be diagnosed what may be wrong, one of the mechanics took for a drive and said that he thought it was half a tooth out? Car has been in today and said timing is correct and nothing showing on diagnose. So has anybody got an idea what it may be? Do I need a fuel pump? High pressure pump? New fuel filter? Clean engine out with some sort of cleaner?
Thanks for any information about the above problem with the vehicle

Cam shaft sensor?