Ok I have a 55 plate 2.2 direct vectra and when its raining it will cut out completely as im driving. Then it wont start for several minutes. When it does eventually start it will repeat the cycle of cutting out again. First time I noticed this is when I jetwashed it. Just happened once and I was on my way. Then we had loads of rain and it just carried on doing it. Not a problem when its dry though. Any ideas?
Also had the AA out to it and he said there were no fault codes stored on it. Both warning lights came on dash (spanner & engine management?) He said it could be the crank sensor but he didnt really have a clue what was causing it.