yeah I know what you saying Naylor as I say had the new gasket in for 5 weeks never had the car when the old gasket was on because the dealer I bought car from put it threw the first service and got the gasket done at the same time before I collected the car.so I am not sure how the car sounded with the old gasket on,I had it on a journey on Saturday about a hours drive giving it some wellie stopped to play football,so car was lying for about 3 hours,once i finished football got in started it again temp outside about 17 degrees but still hearing missfire on the start up until revs drop,then it idles smoothly,just hoping there nothing else wrong with it now.you can let me know how things go once your gasket is done,it was just a gasket replacement mine got.