Shaking Tachometer needle at idle

[steppinthrax]

Essentially I got this 1999 Toyota Camry Yesturday it has around 30K on it. I notice when I'm at full stop at a light or when the car just started. The Tachometer needle seems to shake or vibrate a little bit. I kind of feel a vibration in the brake pedal as well. I'm guess this is indicating vibration in the engine. Anybody has any input on this or knowledge.

 

[ViviTheMage]

mmm misfires ?

 

[overst33r]

Maybe clean out the throttle body or the idle control valve...