Hi - I have a high mileage 320, it has developed an intermittent ignition/cut out. It starts and runs perfectly then when switched of, will not restart, the engine turns over well, but will not fire. it has now stalled a couple of times in traffic and will not restart. last time, I left the car for an hour, went back, and it started and drove home no problem. When this happens, the engine management light comes on. when it doesn't start, the key fob will not return to the first position, and continues turning over without starting? any ideas please as it has become dangerous Thanks