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Vaccuum Advance is a purely mechanical method for varying the amount of Spark Advance based on engine load. A vac-advance distributor is connected to a source of engine vacuum. As vacuum increases, forces of suction rotate the distributor, creating more ignition advance.

The ECU cannot control timing at all with a vacuum advance distributor.

Parents: Web Home > Ecu Families Revision: r1.1 - 20 Feb 2004 - 00:23 GMT - blundar { Edit | Attach | History | More }
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