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Thread: things ontop of valve cover

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    Default things ontop of valve cover

    Does anyone know what are the plugs or sensors that go into the top of the valve cover on a 4.0L. I got 2 and one has a hose that goes to the intake tube and one that goes staight into the intake manifold. I thought it was the pcv valve which is what my hanes manual says but autozone doesnt show a pcv valve for my year jeep. Its a '97.

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    -Mike

    "I personally believe that US Americans are unable to do so because some people out there in our nation don't have maps, and I believe that our education like such as South Africa, and the Iraq, everywhere like, such as, and I believe that they should, our education over here in the U.S. should help the U.S., or should help South Africa, it should help the Iraq and the Asian countries so we will be able to build up our future, for our children."
    -Miss South Carolina

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    now that arrow thats pointin to the first plug where it says fresh air inlet, do you know what its called so i can go buy it at an autozone or something or is this something stricly from the dealer

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    just did a quick google and found this...


    Quote:
    Originally Posted by djwilbanks
    Uh.. That should be part of the PCV (positive crankcase ventilation) system. If that elbow was broken it could, I believe, cause a high idle rpm. But, unless I'm mistaken the elbow
    should channel unspent gasses from the engine into the intake for recycling. It's mostly an emissions control, but it can cause poor performance when the system is disrupted.

    I'd replace the elbow, and if that doesn't work the PCV valve may be stuck which can cause idle speed issues. Might need to be replaced.


    DJ,

    When i ordered the part the guy said it was part of the "CCV" system. I'm not sure about cycling the unspent gases though. It was sucking air into the valve cover from the cold air filter tube.

    Also, from what I have read the 97's 4.0L has a CCV hose (rear elbow on valve cover) because there is a flapper built inside the valve cover that takes the place of a true "PCV". Correct me if I am wrong guys.

    Anyways, I will have the elbow tomorrow and give it a try.




    http://www.wranglerforum.com/f5/ccv-...let-34737.html
    -Mike

    "I personally believe that US Americans are unable to do so because some people out there in our nation don't have maps, and I believe that our education like such as South Africa, and the Iraq, everywhere like, such as, and I believe that they should, our education over here in the U.S. should help the U.S., or should help South Africa, it should help the Iraq and the Asian countries so we will be able to build up our future, for our children."
    -Miss South Carolina

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    yea it did mention the ccv system in my book. i was lookin at the autozone website and i found the elbow but for a '95 4.0 ill just buy it and see if itll work but i think it should. thanks for the help

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