I have a 2.2 BiTurbo and it has been running smoothly apart from the odd thud around 50/70/90 kph. Yesterday it stalled at very slow speed while turning a corner under no stress. It started fine. Today it started fine from cold and then all of a sudden started running on 3, and at times perhaps 2, cylinders. I drove it straight to a mechanic. There was smoke coming from behind the motor. Any one encountered similar problems?