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Fixed Spark Mode (Setting Ignition Timing)

  1. Initial base timing is set by jumpering pins "A" and "B" together at ALDL connector, while NOT in diagnostic mode. The ALDL connector is located near brake pedal, just below dash. See Figure .
  2. Set timing to specification shown on EMISSION CONTROL LABEL. Jumpering pins "A" and "B" together will cause a "SET TIMING" message to appear on CCDIC. This indicates that ECM is in set ignition timing mode.
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