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

Incorrect Idle Speed


1. Defective ignition system.
2. Mechanical defect in engine.
3. Air intake system leaking.
4. Cold start injector leaking.
5. Defective supplementary air valve.
6. Defective airflow meter.
7. Incorrect idle speed adjustment.
8. Incorrect air bypass screw adjustment.