[cal30_sniper]

It is possible. The easiest way to check is to unplug the brown wire for ignition advance, and see how it runs on base timing. If it's set correctly and running really rough, that means your ignition is retarded. Every balancer I've seen slip "advanced itself" so that even when running the proper 0-6* of base ignition advance, the balancer would show something like 15-40* of advance at idle. If you try to retard it back to within spec, the engine will get really choppy, vacuum will drop, and it will die. As far as I know, that's the only way the balancer should ever slip due to the direction the engine is rotating.

-cal30sniper