Base Idle Speed & Idle Mixture
NOTE:
Base idle speed is set at factory. It should not require further adjustment unless plenum chamber is changed. The adjustment screw is sealed with a plug to prevent unauthorized alteration. Check ignition timing before attempting following procedure, since this will affect idle speed. See IGNITION TIMING
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IDLE SPEED & CO LEVEL
| Application | Idle RPM | CO Level |
|---|---|---|
| Base Idle Speed | 500-550 | 0.5-1.0% Max |
| A/T In Neutral | 665-735 | 0.5-1.0% Max |
| A/T In Gear, A/C On | 622-678 | 0.5-1.0% Max |
| A/T In Gear, A/C Off | 572-628 | 0.5-1.0% Max |
| M/T | 672-728 | 0.5-1.0% Max |
| M/T, A/C On | 722-778 | 0.5-1.0% Max |