Hi, had this problem for quite a while and it's doing my head in ! When it's cold and been stood a few hours , my 06 plate Supercharged starts first turn of the key, and for the first few seconds it runs and sounds fine, however within the next few seconds the engine seems to start misfiring or just running rough ! To clear the misfire I have to rev the engine , sometimes just once , sometimes a couple of times more, the misfire then seems to then clear and everything is ok till the next time it's been stood for a few hours ! If I don't rev the engine and put it into reverse the car physically judders so much so that I have to stop the car , take it out of gear , rev the engine and then put it back into R or D. I have the IID Tool and nothing is registered as a dtc. Any ideas anyone ? When it's on the road there are no issues at all !