Hi there i had the same problem here goes. The thing wouldnt start every so often. After going backwards and forwards i found after they had changed the heater box that the volts would disapear from the glow plugs every so often they reapear. We thought it was the heater box as everything inside the car ie glow plug light goes out after its heated and alarm keypad looks as though it operates ok. So it would start most of the time then not others or so you say after half an hour etc.
The fault i found was in the wire harness. The black conector on the right hand side just infront of the battary. Black plasitc outer with all the wires in. UNSCREW the conectors and look inside. You soon see the burn. It connects the harness to the engine harness.
When i opened it there was a bad connection which had burnt a bit. I put a bypass on the wire from one side to the other. This fixed that problem. It causes an intermitent fault. You cant however bypass the whole wire. Itryed this at first but there is a diode i think in there which stops it starting. So just do the bypass before and after the plug and socket.
This first looks like its the bosch fuel pump and alarm bit which is behind it. But its not. Save some money and look at that socket and plug first. I spent loads of money with this going backwards to my dealer......
It was a nasty fault. My wife would go to work and then when she came out would not start. Some times she would call out the aa and by the time they got there it would start sometimes it wouldnt. Then it got towed to the dealer who said they had fixed it. Another month or 2 later and it would fail again.
Saturday, 30 April 2005
Edited Saturday, 30 April 2005