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 both hoses and harness.
2. Remove vacuum switching valve attaching screws and remove valve.
3. Apply battery voltage to valve and ensure that air flows through valve properly.