Good advice from injection doc,have you ever cleaned the plenium out if not you have probable got a ECU fault as described.This plenium on the left hand side below all the plastic directly in front of the windscreen has a drain underneath which becomes blocked it then fills with water and fries the ecu.It can be cured by dismantling and cleaning out the drain and then a hole made in the top cover directly above the drain which you can put a steel rod down it and clean it every few weeks.If you have fried the ecu they are like rocking horse manure to get at a reasonable price.If you are in the north of england then you need someone like Clemo of Cleckheaton 200meters from the m62/m606 junction.