My 2004 2.0JTD has had a cold starting problem since last summer. When the engine is cold it does not start at all although the starter works well. Twenty minutes warming with Webasto heater and no problem any more. The van can then be used the whole day without any problem. Next morning, when the engine is cold again, the problem is there.

Any ideas what might cause this?

I don't know if you have glowplugs or some other coldstart device like a flame starter, which ever you have you need to check what you have and is it working.

Mike

Check rpm and railpressure while cranking and check the leakoff on the injectors. If its very cold have you got the appropriate oil?