HAA!!! Scooter is adapting to Mopar some now.
Okay Bill tell me if you think I get this right... I just get confused about vacuum sometimes & how it all flows. Basically- if the advance is advancing too fast/too soon, I get the pinging at mid range until the motor catches up w/ the timing advance.... Right? So if I temporarily plug advance & note the diff; that will tell me if the timing advance was exceeding the power curve... hence the pinging.