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Home >> Geo >> 1993 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> Idle Speed

Idle Speed

Idle speed adjustment is controlled by the Engine Control Module (ECM)/Powertrain Control Module (PCM). ECM/PCM controls idle speed with the Idle Air Control (IAC) valve. No adjustment is required. Check IAC valve as necessary.

IDLE SPEED SPECIFICATIONS(1)

Application Idle RPM
All Models (2)
(1) If specification differs from emission label, use specification listed on emission label.
(2) Idle speed is computer controlled and is not adjustable.