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)

Or, hide this message: temporarily or permanently

Vacuum Advance Control Solenoid: Testing and Inspection

1. Remove vacuum solenoid valve.
2. Blow air through side port of valve and ensure air flows from valve air filter.
3. Apply battery power and ground solenoid valve with jumper wires.
4. Blow through side port and ensure air flows from top valve.
5. If airflow is not as described, replace valve.