hey guys. recently on my vectra cdxi/gsi 3.2 v6 when i start the car after a long period of time, overnight or after its sat at work all day when i start it for the first 10 seconds or so it shakes really badly and sounds likes its misfiring. but then it suddenly becomes alright i know a few of the other australian guys have the same problem but no one knows what it is. we have cleaned the throttle bodies etc, had services done, major and minor and tried pretty much evrything you could think of. have any of you guys had the same problem in england and what was the cause and the fix... any help is greatly appreciated from all the ozzy boys.

cheers

Adam_92