This is my 2nd Astra where it's had problems. Cylinder 4 was knackered on the 1st Astra 16 8vs. Now my Astra 16 16vs I brought few days ago the service light was on. And on start up the service light went out & the EML is now on... The car does hesitate slightly at 1st. But once warm she's fine... until Sat in traffic or Sat with the engine running. Then temp goes up 2 half way Mark but when I pull away there's a big cloud of white smoke behind...