[Nabeel]

I don't know if this is completely wrong ot not, but recently my dad had identical symptoms as to what you describe on his 740iL. Turns out that one of the gaskets had leaked oil on the sparkplugs, causing the engine to misfire. I'm sorry I don't know much about it, this is all I can remember my dad telling me. I'll ask him later for more specifics on what actually happened.