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)

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Fast Idle Out of Specification When Cold

SYMPTOM
Fast Idle Out Of Specification When Cold

Check:
1. PGM-CARB Control Unit (BU)
2. Carburetor
a. Automatic Choke/Fast Idle System
b. Primary Slow Mixture Cut-Off Solenoid Valve
3. Coolant Temperature (TW) Sensor (6)
4. Intake Air Temperature (TA) Sensor (10)
5. Emission Controls
a. Feedback Control
b. Exhaust Gas Recirculation (EGR)
c. Throttle Control