can anyone plz help, have a golf vr6 mark3, when i turn the key it fires car dosent stay on it jst cuts of, av to keep trying till the car stays on, sumtyms takes hours even a day. but when it stays on its fine, happens evry month, what could be the problem. (when i turn the key revs go up an then the car dies after a second) av to keep trying till car stays on. plz any 1 help.