Hi all, picked up a 2004 1.7 CDTi Elite yesterday, car starts n ticks over great, will drive no probs for around 10 mins then looses all power, if turned off and back on, again starts n ticks over, but when press accelerator even flat to floor, revs barely rise and hunt up n down n battery light flashes, if keep off peddle battery light goes out, only flashes when press peddle. After being left half hour or so, drives fine then same happens again. Any help grately appreciated