Possible the advance weights and springs are sticking, as a part of the tune, I would replace it.
Petronix sells a nice replacement dist. That uses an electronic sensor that replaces the springs and weights. And gives you a precise electonic pick up.
But it's your money not mine :).
You may also want to consider (especially if engine is original) that you have a weak lifter/spring.
I would probably perform a compresion test also, if an intake is sticking, it will cause a backfire.
Monday, December 7th, 2009 AT 6:49 AM