Chevrolet Nova/ChevyII 1962-1979

1975 Vehicles

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Refer to the preliminary adjustment conditions in the previous "1973" section. Make sure that air conditioning is turned off, if so equipped.

  1. Disconnect and plug the distributor vacuum hose.
  2.  
  3. Start engine, check ignition timing, and adjust as necessary.
  4.  
  5. Reconnect vacuum advance hose to the distributor.
  6.  
  7. Turn the idle stop solenoid in or out to set curb idle speed to specified rpm with automatic transmissions in Drive or manual transmissions in Neutral. Refer to the "Tune-Up Specifications" chart.
  8.  
  9. Disconnect the electrical connector at the idle stop solenoid.
  10.  
  11. With automatic transmissions in Drive or manual transmissions in Neutral, turn the 1 / 8 in. hex screw in the end of the solenoid to set the low idle speed to the specified rpm.
  12.  
  13. Reconnect the electrical connector to the solenoid.
  14.  

 
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