*Video included* Weird behavior of '08 3.0si naturally aspirated engine
Only when the engine is warm does this happen. Around 00:16 seconds, you can see the rpm needle rise up a few hundred rpms only to go down again after a couple of seconds. It does this almost everytime when the engine is warm (usually when it had been used an hour or two before).
How about others with the 3.0si engine?