check vacuum on dizzy suck on little pipe
advance moves, then you should not be able to suck any more air through it should be solid.
check the rubber connecting pipes with your own sucking while its connected to thin plastic pipe just a tiny leak is enough to upset the system
+1. My experience with a split vacuum can diaphragm is that it significantly the idle quality.
I have also had the black plastic advance pipe develop small splits which had same effect
I had a similar problem with a lumpy tickover, after going through all the normal checks i replaced the black plastic advance pipe and the connectors, the car now idles much better and is much smoother throughout.
http://www.minispare...00/37H4229M.jpg
Edited by JXC Mini GT, 06 August 2018 - 07:18 PM.