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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Vacuum Advance Control Solenoid: Testing and Inspection

1. Remove solenoid valves and connect a vacuum hose to port on side of valve.
2. Blow air through hose and ensure air is vented through air filter on bottom of valve.
3. Apply 12 volts to valve, then engine air applied to side port through vacuum hose flows out of port on top of valve.
4. Replace valve if operation is not as specified.