The Stovebolt Site Forums The Parking Lot Big Bolts About at my wits end, getting an engine to run

I don't ever remember a motor running like crap with the vac advance disconnected. During a tune up with the motor connected to a Sun machine many times I would plug the vac advance and check the mech. timing advance which meant bringing the R's up and it never produced any ill affects like popping or real crappy running.
Once that was done,reconnect the vac line and check the total timing advance the dist. put out.
I'm not saying the motor ran like it top during this test, but it didn't run like crap.
Dan