hi, i have a citroen xantia 1.9td, driving down the road a couple of days ago and the engine made a terrible rattling noise and stopped. the aa were called and he managed to get it going but then it wont tick over and it is bailing black smoke out the exhaust. there is a light flashes on the dash that when looked up says injection problem. the timing belt was renewed not long ago and is still in tact. it will start but it has to be turned over for ages before it finaly fires, anyone any ideas graham