I have a 2002 toyota corolla 1.6 which vibrates when idle once the engine has warmed up. If the engine is cold and been sat for a while the vibration isnt present untill the engine has been driven and warmed up. Toyota have had the car for a day and thought it might be a faulty intake manifold but that couldnt explain the vibrating when idle only when warm, they thought it would vibrate cold or warm. Once you start to drive the vibration disapears completely. Any ideas would be great.