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Home >> Geo >> 1997 >> Tracker LSi, 4WD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests 1.6L >> Ignition System >> Timing Control Systems
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Timing Control Systems

NOTE: Ensure increasing engine speed advances ignition timing.
  1. Start engine and allow it to reach normal operating temperature. Ensure all accessories are off and idle speed is within specification. Adjust idle speed first if it is not within specification. See ADJUSTMENTS article.
    CAUTION: Driving vehicle with jumper wire installed in test connector will damage catalytic converter.
  2. Connect timing light to No. 1 spark plug wire. Remove cap from test connector located next to battery. Connect a fused jumper wire between terminals No. 4 (Black wire) and No. 5 (Blue/Red wire) of test connector.
  3. Check timing mark alignment on crankshaft pulley with timing marks on timing belt cover. Ignition timing must be within specification. See ADJUSTMENTS article.
  4. If ignition timing is not as specified, loosen distributor hold-down flange bolts and rotate distributor to obtain correct ignition timing. Tighten distributor hold-down flange bolts. Recheck ignition timing.
  5. Turn engine off. Remove jumper wire and install cap on test connector. Remove test equipment.
  6. Start engine. Ensure ignition timing advances with engine speed (RPM). If ignition timing does not advance, check TP sensor, test switch terminal circuit and PCM.
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