Hi All I was sitting stationary at the traffic lights and my indications were that only the electric motor was running. I felt the petrol engine cut in and I noticed plumes of smoke coming from my car, this disappeared when we started moving so the next time I was held stationary with only the electric motor running I paid special attention to the exhaust output when the petrol one cut in and sure as eggs are eggs the billowing clouds of smoke appeared. So is this normal or should I be worried. Has anyone else got this problem or had it in the past? I would be grateful for any input. Regards Peter.