2000 406 hdi car wouldnt startbut after turning engine over 4 about 30 seconds would start.this went on 4 about a week,now car wont start at all. had car diagnosed at local garage and they said the high presure pump was at fault, so had that changed car now starts up straight away but stalls after 10 seconds some times will run 4 30 seconds. car starts up straight away each time have. have changed the fuel relay by the ecu also since the new pump has been fitted if u turn the car of when its running it doesnt stop until the key is taken out has any 1 got any ideas. have also changed the camshaft sensor. when u plug it into the computor it says fuel rail pressure have also changed fuel rail sensor, i need help