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 tank cap is removed, pressure release noise is detected.
1. Folded, bent, cracked, or clogged vapor line.
2. Loose clamp at vapor line piping joint.
3. Incorrectly routed vapor line.
4. Malfunctioning overfill limiter.
5. Faulty fuel tank cap.