how long was it befor you started the car? and i see it is a VR so how was the weather the coil packs get cracks in them and is there is any water in them it can cause a slight missfire and if i let my car sit for a while it will idle rough at first its a VR thing all of mine have done that and yes check the vacum lines all thou if it didnt do it on the second start i dont think it is a vacum leak i would drive the car and see if the car runs smooth let us know
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