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Home >> Pontiac >> 1999 >> Grand Prix GTP, 2D Coupe >> Repair and Diagnosis >> Engine Performance >> Specifications >> Engine Control System - Service & Adjustment Specifications >> Fuel System >> Idle Speed & Mixture
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Idle Speed & Mixture

NOTE: Idle mixture is controlled by Powertrain Control Module (PCM). Idle speed is preset by manufacturer and is not adjustable.
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