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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Engine Controls - On-Vehicle Adjustments >> Ignition Timing (Gasoline) >> Camshaft Retard Offset (5.0L & 5.7L) >> Adjustment

Camshaft Retard Offset (5.0L & 5.7L): Adjustment

  1. Turn ignition off. Slightly loosen distributor hold-down bolt. Start engine. Increase engine speed to more than 1000 RPM.
  2. Using scan tool, monitor CAM RETARD OFFSET. To adjust for a negative reading, rotate distributor counterclockwise. To adjust for a positive reading, rotate distributor clockwise.
  3. Continue to adjust as necessary until zero degrees is attained. Turn ignition off. Tighten distributor hold-down bolt to 18 ft. lbs. (24 N.m). Start engine. Increase engine speed to more than 1000 RPM. Using scan tool, verify camshaft retard offset adjustment.
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