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Home >> Geo >> 1991 >> Metro Base, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Ignition Timing >> METRO & METRO LSi (WITHOUT ESC)

METRO & METRO LSi (WITHOUT ESC)

  1. Start and warm engine to normal operating temperature. Ensure idle speed is within specification. See IGNITION TIMING SPECIFICATIONS table. If idle speed requires adjustment, see IDLE SPEED under IDLE SPEED & MIXTURE. Turn engine and all accessories off. Remove and plug vacuum hose from distributor advance unit.
  2. Attach timing light to No. 1 spark plug wire. Start engine and check timing mark alignment on crankshaft pulley with timing marks on timing belt cover. Ignition timing must be within specification. See IGNITION TIMING SPECIFICATIONS table.
  3. If ignition timing is not within specification, loosen distributor hold-down flange bolts and rotate distributor to obtain correct ignition timing. Tighten distributor hold-down flange bolts to 10 ft. lbs. (13 N.m). Recheck ignition timing.
  4. Reconnect vacuum hose and note ignition timing. Ignition timing should be within specification. See IGNITION TIMING SPECIFICATIONS table. Turn engine off and remove timing light.