hi all i have a 2009 fiesta and am having a problem. over the past few days, i start the car fine and drive to the shops, when i get back into the car it wont start, i just get a radid clickng noise. i have to jump the car. then i drive home and when i go to use it again its fine. this keeps happening. i starts fine but after a drive it wont start again. any one help?