well i finally got my van back turns out it was the rail that powers the glow plugs, It supposed to go in front of the plugs but for some bizzare reason mine was behind some of them !!! in turn it was just touching a metal clip and shorting out. It kept blowing the glow plug fuse on the inner wing......anyway long story short the guy said he spent 4 hours pulling his hair out over this one but the good ol boy only charged me 1 hour labour!!!! mind you I have spent nearly 800 quid with him in the last 2 months!!