Thread: new cam-wont fire

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10º is a good starting point for initial advance. Line up plug wire terminal and rotor at that setting and you're closer than you would be to the actual firing event than if set at TDC. Not likely to be a coil issue. As for the Pertronix, was it functioning properly before the cam change?

Bob

Pull the valve cover on the number one cylinder side.

Turn the engine over by hand, when the number one intake valve closes watch for the timimg mark to come up on the damper. Stop at 10 degrees advance, now put the number one plug wire where the rotor is pointng, either by rewiring the cap or (preferred) by repositioning the distributor.

It should start right up.