This isn't my BMW E34 but another car that I have. It is 1984 Maserati BiTurbo (carbureted). Recently, I took the intake manifold off to get to the starter to fix loose connection and clean connector contact but after putting the manifold back and everything else, I noticed a rough idle (same thing with giving gas) when the engine reaches operating temperature. This ONLY happens when the engine is hot. When cold or during warm up, engine idles and runs very smooth but once it reaches operating temperature it does this. Click the link below to see what I mean. Any idea why this is? Sorry, took the video with my phone so video quality isn't that good. Anyway, thanks in advance for any comment or suggestions.

http://www.youtube.com/watch?v=AF_5TM20t-A

http://www.youtube.com/watch?v=BnOE5a3E48c