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Old 06-14-2008, 02:30 AM   #1
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Default 99+ VICS Question

How are the butterflies opened? Does vacuum keep them shut and then releasing it opens them? or does applying vacuum open them?
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Old 06-14-2008, 11:08 AM   #2
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You can play with the acuator, just reach in and move it. They're normally open, then they close at the stock RPM setpoint IIRC.
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Old 06-14-2008, 11:26 AM   #3
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with an RPM switch / shift light

/thread
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Old 06-14-2008, 12:17 PM   #4
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Quote:
Originally Posted by hustler View Post
with an RPM switch / shift light

/thread
Did you even read the post? I know how to control it... i was asking how it works.


Anyways i figured out my issue....on my old escort i just ran a vac line to the actuator because the vacuum would hold them closed while cruising and as soon as boost came on they'd open. Worked well and i tried doing the same to the miata but it felt choked up all the time. I thought maybe on the miata they used vacuum to open them instead but then i realized the line i used ran straight to the vac reservoir so the vics was being held closed all the time.....oops.
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Old 06-14-2008, 05:57 PM   #5
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Low revs = no vacuum applied
High revs = vacuum applied via ecu controlled rpm switch.
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