Hi Guys I have a problem can anyone help! Approx once a fortnight we can be out with the car when we return to the car the engine will turn over but not fire. I open the bonnet on the near side inner wing there is a black box I remove the lid with 4 philips screws pull out all the fuses one by one and put them back in then the car starts!!! I think it is a electrical problem has anyone any ideas Please ( I have replaced the diesel shut off valve thinking that might be at fault but to no avail) Paul P