Just bought a mk1 focus rs and it seems to cutt out when the revs drop approching traffic lights or slowing down for cars, the battery light comes on then it just dies. i have changed the TPS and seems to be better but still doing it, not sure if changing the TPS has helped at all. It seems to do it once the car has been driven hard and temp is up. Its like there is not enough revs to keep the engine turning over, but it idle's fine just below 1000rpm.

Any ideas please?

Cheers

Ben