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PCV elbow

This is a discussion on PCV elbow within the General Help forums, part of the LSx Technical Help Section category; Should the PCV elbow connecting the end of the PCV valve to the intake manifold (just behind the throttle body) ...

  1. #1
    Member ronnie tadlock's Avatar
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    PCV elbow

    Should the PCV elbow connecting the end of the PCV valve to the intake manifold (just behind the throttle body) collapse when the car is running? It's really soft rubber that just buckles and collapses when the engine is running. Could this be causing my strange, high idle at times?

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    Senior Member clg82's Avatar
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    Quote Originally Posted by ronnie tadlock View Post
    Should the PCV elbow connecting the end of the PCV valve to the intake manifold (just behind the throttle body) collapse when the car is running? It's really soft rubber that just buckles and collapses when the engine is running. Could this be causing my strange, high idle at times?
    That is exactly what could be doing it. Not sure how to fix it.

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    Quote Originally Posted by clg82 View Post
    That is exactly what could be doing it. Not sure how to fix it.
    how about replacing it? it has probably softened from what it should be, or somebody replaced it previously with the wrong type of hose.

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    Quote Originally Posted by dklowrider View Post
    how about replacing it? it has probably softened from what it should be, or somebody replaced it previously with the wrong type of hose.
    exactly. mine got extremely soft and would collapse so its definately junk what you have. I just replaced with something I had handy and still works great. That could definately be your problem. mine actually had a whole in it and I could hear a hissing but I know what your talking about. the high Idle is more than likely an exhaust leak inspect other hoses just to be safe.

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    Sorry meant vaccum leak not exhaust leak.

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    That guy thearborbarber's Avatar
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    Just replace the rubber hose with some braided fuel line.

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  8. #8
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by dklowrider View Post
    how about replacing it? it has probably softened from what it should be, or somebody replaced it previously with the wrong type of hose.

    Either the hose is old and fatigued or it's a cheap hose. Just replace with good quality hose and you are good. I've noticed some of the auto chain stores are selling some pretty cheap fuel hose with thin wall. Find good quality that will bend a nice 180 without kinking.

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