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Valve in pcv system 850 1994

posted by  davemcleod on  Fri Feb 20 14:11 CST 2004
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Hi
Can anyone tell me the function of the valve? at the end of the pcv system(where it connects to the intake, just before the turbo. It has an elect connection on it...may be a sensor and not a valve. Also, any ideas on how to function test it?
Dave
94 854T
91 745T
83 242glt








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    Valve in pcv system 850 1994

    posted by  bay13 on  Sat Feb 21 10:14 CST 2004
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    It's a heater circuit, thats where the crank case fumes are recycled into the intake and that connection has the electricial connection, the large hose (from the PCV box) and the smaller hose, a vacuum source to help pull the fumes into the connection.
    --
    Rich K. http://www.volvospeed.com/bay13.htm bay13@cox.net








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      Valve in pcv system 850 1994

      posted by  davemcleod on  Mon Feb 23 02:20 CST 2004
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      Thanks! What would it be heating? I would assume that any blowby would already have a fair bit of heat...any idea on testing? I've been told it needs replacing but..just call me an untrusting soul!
      Dave








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    Valve in pcv system 850 1994

    posted by  SUNSCIRCUS on  Sat Feb 21 00:34 CST 2004
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    last visit: Fri Jan 29 03:20 CST 2010
    [RELATED]

    FYI: There's NO flame trap (PCV = Positive Crankcase Ventilation valve) in the turbo models.








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      Valve in pcv system 850 1994

      posted by  davemcleod on  Mon Feb 23 02:29 CST 2004
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      I realize that there is no flame trap in a turbo...however things would certainly get interesting if there was no PCV system(positive crankcase ventilation)...in *any* car. It's got to go somewhere! :)
      Cheers dave








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      Valve in pcv system 850 1994

      posted by  850 owner on  Sat Feb 21 08:52 CST 2004
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      last visit: Sun Sep 2 21:30 CST 2012
      [RELATED]

      If it's a metal cylinder that's about 3 inches long it's the idle control valve. It opens and closes to regulate your idle RPM. Take it out and clean the insides if you have it out. Can help stabilize the idle if you clean a dirty one.
      --
      '94 854 N/A.







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