Hi there, I have a fiesta rs turbo. it runs fine when warm (except the occassional small jolt) but when cold it run s light a bag of nails and keeps dying, sometimes it will start and run fine but when you go to drive it a little way down the road it will cough and splutter and die, get it going again and let it warm up well and it is fine. Have bin told it might be the coolant temp sensor. Can anyone help me, thanks Chris.