Do you feel ur Yaris shaking when waiting at red light?

[gid]

for those of you whose YARIS shakes . Is it an automatic ( L.B. included ) ? Please reply . Could tell us something about the engine / tranny combo . The '08 Liftback 5 speed manual does not / less shake ( rough idle at stops ) than the '08 automatic sedan . Also , noticed that when put the auto sedan into neutral at redlights , stop signs , or when parked the car shakes less ( better idle ? motor mounts for YARIS with automatics ? ) . Is this the case for others ? Give it try and let us know the results . THANKS .

[Yawesh]

Originally Posted by gid

for those of you whose YARIS shakes . Is it an automatic ( L.B. included ) ? Please reply . Could tell us something about the engine / tranny combo . The '08 Liftback 5 speed manual does not / less shake ( rough idle at stops ) than the '08 automatic sedan . Also , noticed that when put the auto sedan into neutral at redlights , stop signs , or when parked the car shakes less ( better idle ? motor mounts for YARIS with automatics ? ) . Is this the case for others ? Give it try and let us know the results . THANKS .

yup it's an auto, and when i shift it to neutral when idle, it shakes less - but i do hear the engine "tapping" better.

[XYaris]

Originally Posted by gid

for those of you whose YARIS shakes . Is it an automatic ( L.B. included ) ? Please reply . Could tell us something about the engine / tranny combo . The '08 Liftback 5 speed manual does not / less shake ( rough idle at stops ) than the '08 automatic sedan . Also , noticed that when put the auto sedan into neutral at redlights , stop signs , or when parked the car shakes less ( better idle ? motor mounts for YARIS with automatics ? ) . Is this the case for others ? Give it try and let us know the results . THANKS .

The power that the brakes need is what causes your rpm change and in turn the 'shaking' The car does it less or not at all in neutral because the brakes arent being used. For the same reason, a manual shakes less or not at all because less brake force is needed or none at all because the car wont drive away if one lifts up on the brakes. At the risk of being repetitive, this slight vibration is ok and represents the car adjusting rpm to a higher load. Having a tachometer to witness these clearly methodical and exact rpm adjustments would likely put your concerns to rest.

[TheSilkySmooth]

[QUOTE=XYaris;223129]The power that the brakes need is what causes your rpm change and in turn the 'shaking' The car does it less or not at all in neutral because the brakes arent being used. For the same reason, a manual shakes less or not at all because less brake force is needed or none at all because the car wont drive away if one lifts up on the brakes.=QUOTE]
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I have a manual and it shakes a lot. Better now after its broken in though. The brakes dont use any electrical power other than the brake lights. The ECU knows you have applied brakes and is hunting for lowest idle. Having an AC "on" sequence will cause a temporary idle speed drop-and-rise and the ECU will hunt again for lowest stable idle speed. I think the ECU programming could have better anticipated the ac on cycle and performed a concurrent idle 'up' whilst the compressor cycles 'on' which sucks up power in the mechanical accessory drive PLUS some significant electrical for the ac clutch electro-magnet.