: I was working on my &5 Duster the other day and
: noticed that the PCV valve was chattering. I
: pulled it out of the VC and plugged the hole
: with my thumb. It smoothed out the idle and
: stopped the chatter. I now have it plugged
: off, but why does it do this? Is this
: normal(I do not think it would be)? What
: would cause this? It is a new Fram PCV
: Valve, the carb is a Holley 2brl on a Super
: Six manifold. It runs real nice at idle now
: with it plugged.
: Whats up?

: I would suspect that the vacuum is not constant
: to the PCV valve. I have seen this when
: there is a bad intake valve that allows
: compression to leak past the valve and push
: the PCV valve closed.
:
: Chuck

: The strange thing is that it does this with the
: PCV valve out of the valve cover.

:
: Of course, the pressure that makes it chatter
: comes from the carb if there is a valve
: problem. Do a compression check.
:
: Chuck