Do I have to use PCV with breather?

Discussion in '1994 - 1995 Specific Tech' started by str8stang036, Dec 12, 2003.


  1. str8stang036

    str8stang036 New Member

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    I think i read once that if the PCV was in and there was a breather that, that would make it a vaccum leak. I just wanted to make sure if I fine using the PCV and the breather or no PCV and yes breather?
     
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  2. final5-0

    final5-0 Mustang Master

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    I'm not sure on this but I have seen many say that using a breather allows unmetered air and this messes with
    the pcm's ability to keep a/f ratio like it needs to be in closed loop.

    Later
    Grady
     
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  3. yellow1995Cobra

    yellow1995Cobra New Member

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    str8stang - Im not sure the reason ur using the breather.. Im guessing the VC's ur using have no oil fill neck?

    I had to cut my oil fill neck off and this is what i did - i got a rubber gromet and stuck it in the hole in the VC, the inside diameter of the gromet is the same as a pcv valve.. So i just cut the inside of the pcv valve out (not sure if its necessary) and stuck it in the gromet. Then used a short piece of vacuum hose to conect the pcv valve to the normal stock location on the inlet pipe.

    Before i did this i just ran a breather and had no problems, so who knows. :shrug:
     
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  4. str8stang036

    str8stang036 New Member

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    yeah the covers im installing dont have a filler neck. I was just wondering if I would be ok.
     
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  5. S/CBlack95GT

    S/CBlack95GT New Member

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    I run a breather with the PCV in place and it works great. It does allow unmetered air but it doesn't seem to cause any problems. My idle increased by 50-100rpms, but that was it. :nice:
     
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  6. str8stang036

    str8stang036 New Member

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    Thanks guys
     
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