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Home >> Oldsmobile >> 1990 >> Cutlass Calais Base, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing - 2.5L/151"" TBI In-Line 4 VIN [U] >> Air Induction/Idle Control System >> Fast Idle Check/Adjust
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Fast Idle Check/Adjust

The fast idle is electronically controlled by the Electronic Control Module via the Idle Air Control (IAC) valve assembly. No adjustment provisions exist.

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