measure gap between rotor and plug posts in distributor cap

[Bob Bidonde]

This may help. Make the gap 0.015" to 0.025" by gently /carefully bending the brass tab on the rotor. The rotor's tab should pass by the middle of the contact in the distributor body. If the tab becomes loose or the rotor breaks, get a new one.

[chrs1961815]

What I have found is that too large a gap causes the engine to not run as well and backfire occasionally. A slight gap or the spring touching the carbon contact work fine.

[Chuck Sea/Tac]

Originally Posted by chrs1961815

What I have found is that too large a gap causes the engine to not run as well and backfire occasionally. A slight gap or the spring touching the carbon contact work fine.

Are you referencing the rotor spring and the carbon button on the cap? There should be no gap there, just a slight spring pressure as you push the top/cap down to lock it in place.