Some one doesn't post anything for ages then three come along at once :)   On Sunday the family and I were in the car.  We were tootling down a road when all of a sudden there was a weird sound, a sort of pop and bang combined. Straight after that the engine started making a sort of ticking which increased with acceleration and slight smell of petrol. As we were less than half a mile to our destination I tried to carry on but once we got on to a hill and more power was needed the noise