5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

PCV problem

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Old Sep 17, 2008 | 06:45 PM
  #11  
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fordboyyfm
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take the pcv off and just runn breathers on the valve cover, you want want the oil going into the intake, its like it cuts down the octane of your fuel in half and your running lean.
the rings in your new motor are prob not set in yet, takes a while for some of them so right now you have a little more blow by and thats why the oil is getting pushed through the valve cover.
Old Sep 18, 2008 | 12:09 AM
  #12  
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89coupe
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anyone else got any ideas
Old Sep 18, 2008 | 01:28 AM
  #13  
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Check this for some background info...
http://www.freewebs.com/vristang/pcv...trolissues.htm


I haven't seen the motor, and I don't know for sure what your pcv setup really is,
but my opinion is that you need to increase the VOLUME that the pcv system can flow, which will decrease the velocity of crankcase gasses leaving the lifter valley.

jason
Old Sep 18, 2008 | 01:31 AM
  #14  
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dudeboy
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Originally Posted by fordboyyfm
take the pcv off and just runn breathers on the valve cover, you want want the oil going into the intake, its like it cuts down the octane of your fuel in half and your running lean.
cuts the effective octane in half, and makes the AFR lean?
Is the lean AFR supposed to be caused by the octane drop?
Care to back some of that up? Any documentation to support this?

Sounds like internet hogwash to me,
jason
Old Sep 18, 2008 | 12:42 PM
  #15  
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89coupe
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i am using the vacuum setup that holley recommends and the line on the pcv valve to intake is 3/8's hose.
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