TwinTurbo.NET: Nissan 300ZX forum - Yes, the pcv valves are closed under boost. However, the
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Subject Yes, the pcv valves are closed under boost. However, the
     
Posted by Evan_Wright (Ca) on September 20, 2012 at 7:05 PM
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In Reply To Re: What did you use to adapt the new style injectors into posted by Glooj on September 20, 2012 at 06:43 PM
     
Message the crank case does see pressure during a boost leak test due to blow by at the rings.

Doubt you messed up the air regulator spraying wd40 into it.

My guess is the fuel rail to lower plenum insulators or the lower to upper plenum gasket shifted out of place during install.

Those insulators can get hard and brittle over the years and prob won't seal well if disturbed.

     
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