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Carburetor Switch Test

  1. Turn ignition off and disconnect 10-wire connector from computer. With throttle completely closed, check continuity with ohmmeter leads connected to cavity 7 and ground.
    NOTE: Grounding carburetor switch eliminates all spark advance on most systems.
  2. If no continuity is read, check wire from cavity 7 to carburetor switch terminal. Also check carburetor switch for proper operation.
  3. Open throttle and again check for continuity from cavity 7 to ground. There should be none.
    NOTE: After performing carburetor switch test, perform tests on the spark control system and fuel control system.
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