Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

System Specifications

The minimum idle speed air rate is set at the factory with a stop screw and is not adjustable. This setting allows enough air flow by the throttle valves to cause the Idle Air Control (IAC) valve pintle to be positioned a calibrated number of steps (counts), from the seat, during controlled idle operation. If Idle Speed is incorrect, begin diagnosis at Powertrain Management / System Diagnosis / Flow of Diagnosis. Testing and Inspection