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Home >> Honda >> 1987 >> Civic Base, 2D Hatchback >> Repair and Diagnosis >> Engine Performance >> System >> Spark Control System >> System Testing >> Civic - Except Federal 1500 Hf >> Cold Engine
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Cold Engine

  1. Ensure engine coolant temperature is below 59°F (15°C). Disconnect vacuum hose No. 2 from vacuum advance diaphragm B. Connect vacuum gauge to hose.
  2. Start engine and check for vacuum at idle. If there is vacuum, proceed to HOT ENGINE test. There should be vacuum. If there is no vacuum, replace thermovalve B and retest.
Fig 1: Ignition Timing Controls (Civic - Except CRX Si)
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