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Lexus
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1998
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LS 400
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Adjustments
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Idle Speed & Mixture
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Idle Mixture
Idle Mixture
NOTE:
Idle mixture is controlled by the ECM and is not adjustable. If vehicle fails emissions test, Heated Oxygen Sensor (HO2S) may be faulty, causing a trouble code to set. See TESTS W/CODES article.