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Old 10-14-2008, 07:14 PM
Mez Mez is offline
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one thing to check is see if your distributor has up and down play in it if it does what can happen is when the eng is off it drops down and because of the angle of the teeth on the gear it advances the distributor so it goes to 22 deg or whatever more than you set it at. As soon as it starts it lifts up and retards it to your 18 deg and you can never see it happen. Take the cap off and the rotor and without moving the centrifigal advance move the distr shaft clockwise and counter clockwise and see how much play it has. I find gm dist have allot of play and I make a shim to take up the play and helps with this exact problem.
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