My wife has a vauxhall corsa 1.2 sxi 03 plate and it has been nothing but a pain. It first started cutting out over a year ago, the AA diagnosed the problem as the catalytic converter so that was replaced, still no change! I took it to a local garage who first told me it was a the head gasket that had gone, had to pay out a small fortune and still had the same problem. Ive driven it and it doesnt even feel like your driving it, there is no acceleration response etc etc etc. Im now, after reading these answers, gonna change the crankshaft sensor and if that doesnt work, take it to a vauxhall dealership and hopefully pay to get it finally sorted properly!!!
James Best, March 2010