Originally Posted by RobertO58
it diesels when i try shut it off and i still get a back fire through carb, also when i remove vacum advance hose the motor dies,
I'm gonna go out on a limb here and say that you have the vacuum advance hooked up to the incorrect vacuum port.
It has to be hooked to a ported vacuum source, NOT manifold vacuum.
There should be NO vacuum present at an idle.
Find a vacuum port that only has vacuum when you rev motor up.
Further more, you always set the intial timing with the vacuum advance un-hooked.
Also if the motor is idled UP too high it will desiel when u cut it off.
IMO> This is part of your problem(s)
Cp