Grand Move cutting out :help:



My Grand Move has been cutting out which is especially frustrating (and dangerous) at roundabouts and corners!!

I am a very busy mum so I thought I would phone a mobile tuner, but was told that the car has a computer on board and it could be a problem with that. Now I don't know where to go to get it tuned up by someone who knows what they're doing, we don't seem to have any Daihatsu garages where I live (St Albans, Herts). Any suggestions???