My 96 disco tdi has recently developed an issue starting, it all came about when i almost ran out of diesel a few weeks ago. I coasted to a layby and walked the mile or so to a garage. Since this it seems to take forever for her to start up when cold. Any ideas to what this might be and how do i go about sorting it??????? I'm new on here so go gentle with the p**s taking for almost running out of fuel