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Bored&Stroked · 11-02-2015, 06:14 PM

Maybe the mechanical advance is stuck or not working? That could cause you to have to use more initial timing to get it to run right. You might want to use a timing light to identify a place on the crank pulley that you can see when you have it on #1 - paint a mark at that place. Then just make a wire pointer of some kind. You won't know how much total advance, but you'll be able to see if the distributor is advancing. Just for eyeball purposes on an early style pulley - about 7/16 of pulley length (at the outside edge) is worth about 10 degrees of advance. This way, you can see how much advance is coming in off of idle . . . might help you diagnose the problem. Hopefully this is making sense.

11-02-2015, 06:14 PM	#4
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,079	Re: Very strange timing.... Maybe the mechanical advance is stuck or not working? That could cause you to have to use more initial timing to get it to run right. You might want to use a timing light to identify a place on the crank pulley that you can see when you have it on #1 - paint a mark at that place. Then just make a wire pointer of some kind. You won't know how much total advance, but you'll be able to see if the distributor is advancing. Just for eyeball purposes on an early style pulley - about 7/16 of pulley length (at the outside edge) is worth about 10 degrees of advance. This way, you can see how much advance is coming in off of idle . . . might help you diagnose the problem. Hopefully this is making sense.