Running problem help

[Rs slim]

Hi all just got myself a 2004 berlingo and the problems have already started lol when I start it up and leave it running a few mins it starts running lumpy and a bit of whilte smoke if I rev the van it clears then back down to tick over then lumpy again
Also it runs out of fuel on 1/4 of a tank and I drained the tank the other day and there was loads of diesel in on 1/4 not sure if this is related also there looks like air in the clear fuel pipes around the engine bay
Any ideas will be good cheers

[Rustscrat]

Hi, look for wet marks around the joints of the fuel lines right back to the tank.
Air ingress is your problem. tudy:

[Rs slim]

Cheers for that anything elce to look for cheers