Vibration, occasional high idle, and other shenanigans in 2009 auto Yaris hatch

[tmontague]

Originally Posted by DarkShadowFox

get the TRD engine mounts, the stock ones are vibration prone. or make filled mounts with poly.

Poly filled mounts/stiffer will only make the vibration worse.

High idle that you have is completely normal. With more load on the car the vibration is also normal. The 1nz has a relatively low idle for a 4 banger so it will vibrate with high load on it at idle and then the idle will rise slightly and the vibration will go away. This will periodically fluctuate and happen.