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Home >> Chevrolet >> 1998 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> Engine Performance >> Engine Adjustments >> Ignition Timing >> Camshaft Retard Offset >> Checking Retard Offset

Checking Retard Offset

  1. With ignition off, connect a scan tool to Data Link Connector (DLC). Start engine and run until normal operating temperature is reached.
    NOTE: Camshaft retard offset reading will NOT be accurate with engine speed less than 1000 RPM.
  2. Increase engine speed to more than 1000 RPM. Using scan tool, monitor Cam Retard Offset. If camshaft retard indicates zero degrees plus or minus 2 degrees, distributor is properly adjusted. Procedure is complete. If camshaft retard is not zero degrees plus or minus 2 degrees, see ADJUSTING RETARD OFFSET.
NOTE: Camshaft retard offset reading will NOT be accurate with engine speed less than 1000 RPM.
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