hi guys, seems like i got a problem with my ignition, as i cant switch my car off. I can come to a stop and turn the key to the off position and pull out the key, lock the steering but the car still runs. I have got to stall the car and disconnect the battery. When i put the termonal back on the lights on the dash come on, but when you put the key in and turn it nothing happens, so have to push start it. If i need to buy a new ignition barrel, is it a big job to do? Any advise will be appreciated. Many thanks.