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Home >> Volvo >> 1982 >> 245 GL, 2.1L Eng VIN 45, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Computerized Engine Controls >> Diagnosis & Testing >> Engine Starts But Will Not Run Properly

Engine Starts But Will Not Run Properly

  1. Check ignition timing with the vacuum hose at the ignition system electronic control unit disconnected. When setting timing, set at 12° BTDC. When checking, ignition timing of 10-14° BTDC is acceptable. Check advance by increasing engine speed and observing whether timing advances.
  2. If necessary, try a new electronic control unit and re-test. Check vacuum advance. Run the engine at approximately 1500 RPM with the vacuum hose disconnected. Reconnect the vacuum hose, and ensure that timing changes. If timing does not change, check the vacuum line for cracks or poor connections. If the vacuum line is okay, try a known good electronic control unit.
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