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Home >> Ford >> 1988 >> Escort EXP Automatic >> Repair and Diagnosis >> Engine Performance >> System >> 1.9L EEC IV Testing >> Quick Test >> Computed Timing Check
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Computed Timing Check

  1. Turn key off, wait 10 seconds. Start engine. Activate KEY ON ENGINE RUNNING (KOER) SELF-TEST  . After the last service code has been displayed, the timing will remain fixed for 2 minutes, unless SELF-TEST is deactivated.
  2. Correct SELF-TEST timing equals base ignition timing (10 degrees BTDC on all engines) plus 17-23 degrees BTDC. If timing is not 27-33 degrees BTDC, go to TEST D13  . If timing is 27-33 degrees BTDC, proceed with KEY ON ENGINE RUNNING SELF-TEST.
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