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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Deceleration Valve: Testing and Inspection

VACUUM CONTROL VALVE

1. Disconnect air regulator side of air hose connecting 3-way connector to vacuum control valve.
2. Check that vacuum control valve operates when engine speed is decreased from 3500-4000 RPM to idle, by placing fingers on end of hose.
3. If there is no vacuum at end of hose, replace vacuum control valve.