VSV valve

  • Thread starter 77cruiserguy
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77cruiserguy

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Jul 16, 2010
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Under what conditions should the vsv open up the vent line from the charcoal filter to the manifold vacuum? Mine is a deamogged April 77’ 40. Gas tank is getting pressurized like crazy. I can easily draw air (fumes) by sucking on the line. It’s clear. The VSV is just not opening it up.

I’ve pulled the control module and given it a good cleaning and ensured the connections are nice and shiny. When should it open per design?
 
1911

1911

chupacabra
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Aug 11, 2006
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Parker County, Texas
See attached page from the 2F Engine Emission Control Repair Manual.
 

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  • Fuel Evap Emission Control System.pdf
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