buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

Idle Speed > < Base Idle Speed
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Air/Fuel Mixture: Adjustments
Controlled Idle Speed

The Controlled Idle Speed is maintained by the Powertrain Control Module (PCM) and is not adjustable. If Controlled Idle Speed is incorrect, begin
diagnosis at Powertrain Management / System Diagnosis / Flow of Diagnosis

Idle Speed > < Base Idle Speed