Chevrolet Workshop Service and Repair Manuals > Astro Van M L4-151 2.5L (1985) > Engine, Cooling and Exhaust | Engine | Tune-up and Engine Performance Checks | Idle Speed | System Information | Adjustments | Idle Speed

Page 1

Idle Speed: Adjustments
Fast Idle Speed

4-151 TBI ENGINE
Fast idle speed is controlled by the Electronic Control Module (ECM) and is not adjustable.

Chevrolet Workshop Service and Repair Manuals