Navid. you were 100% right. it was through coil pack on number 3 cylinder. Its been replaced and all is well. I also got them to check my windows as on the odd occasion they don't close the last little bit after closing the doors. They replaced both motors! I have never been do glad of extended warranty. The cost of parts and 6 hours labour would have been a bitter pill to swallow after only having had the car a couple of weeks.