Engine bogging when breather attached...?

["Chris Gray" <grayc@rpi.edu>]

first of all, thanks for all the info i've gotten so far... its been most
helpful!

..My '69 1600 boggs and will stall when the breather from the valve cover is
attached to the airfilter housing.  the tube is not clogged, and the engine
runs absolutely fine without it attached.  if i raise the idle to maybe 2000
rpms, it runs fine unless i quickly rev it and then it will stall.  any
ideas?

thanks so much,
Chris Gray
www.rpi.edu/~grayc

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