I have had my S2 for a few months now and i have noticed that when i get down to a quater of a tank then the engine just wonts to cut out if i cornor a bit hard then it does cut out

I have had a look through the history i got with the car and at some point the tank has been removed and check and refitted i have also spoke to the old owner and he says they couldnt find a problem

Has anybody got any idea's what it could be because i dont think its right


Thanks Brian