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Old 01-21-2009, 10:24 AM   #32
TheSilkySmooth
 
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Drives: 08 3DR 5M Bayou Blue; 09 Fos
Join Date: Oct 2008
Location: New Hampshire
Posts: 622
[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.

Last edited by TheSilkySmooth; 01-21-2009 at 10:27 AM. Reason: typos - is this GRCCK?
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