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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EEC System Malfunctions


When fuel cap is removed, pressure releasing noise can be detected.
1. Incorrectly routed vapor line.
2. Disconnected vapor line joint.
3. Folded, bent, cracked or clogged vapor line.
4. Faulty fuel tank cap.
5. Malfunctioning overfill limiter (two-way valve).