Originally Posted By belvedere383
I am thinking that there is too little vacuum at idle and it is allowing the PV to open while idling, but I could be wrong i'm gonna switch to the block offs and check how that works along with going over the whole engine for vacuum leaks.

Also this carb is brand new out of the box, I put it on when I switched the cam.


Like was said already.. plug the PV till you get it running
right then put in the PV and reduce the pri jetting 7 sizes..
make sure your timing is set first
wave