Quote:
Originally Posted by Arcadien Angel
Why? Is there a reason for this? I've been looking for days and can't find a definitive answer.
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I've never looked at the PCV diagram for a CVT, but I would bet $1 it's because an auto does not pull nearly as much manifold vacuum when you let off the throttle. So an external vacuum source is required.
If you transition from throttle to brake in a manual, you get a lot of manifold vacuum. In an auto, you take your foot of the throttle it upshifts (and some CVTs go to idle) and you have little-to-no vacuum.