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Old 03-25-2012, 04:36 AM
SD300 SD300 is offline
home of 4,5,6,8 cylinders
 
Join Date: Jul 2005
Location: Vancouver BC
Posts: 504
Quote:
Originally Posted by kerry View Post
I'd look into the role that the butterfly valve is playing. Is it possible to keep the butterfly valve open while idling not allowing the buildup of vacuum in the intake manifold and see if you get the same smoke when pulling away?
the butterfly valve controls the RPM, when vac drops the RPM increase!

similar to a gas engine car.
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