I ran across a video on utube a guy was running an ODB live data and came to the conclusion that the activation of this system was causing is stumble I a look in my service manual and found this page and looking at after reading how it works and looking at the diagram. The question how is the opening of this solenoid introducing fresh air into the exhaust flow? How does the line connected to the airbox overcome the vacuum of the throttle body to allow air thru it? Am I missing something in understanding how this system works?
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