I have a 1978 BJ40 with a B model diesel. It will start for a couple of seconds but immediately shuts off. It will not idle. I have bled the fuel lines all the way to to the injectors and its getting fuel all the way. I have replaced all 4 glow plugs (needed replacing anyway). I have replaced the fuel filters. This is a sudden symptom and was not a gradual onset. The first time it happened the engine was warm so its not a hot/cold related issue. It does seem to coincide with my first use of B20 biodiesel. Any help and advice is greatly appreciated.