Hi all, I went to start my D today and yet again it wouldn't start. The engine turned over a couple of times then stopped. The battery gauge reads less than 8 but everything electrical works, even the cooling fans???? I'm sure it's not the battery because it's just had a new one and the problem only seems to have started since it's got cold. I've read something about the cold start valve but didn't really understand it. Is there any way to stop this happening for good? Thanks, J