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

Deceleration Valve: Testing and Inspection

Disconnect and plug vacuum line from valve. With engine idling, open throttle completely and release quickly. If valve is operating properly, air will flow out for a few seconds. If air continues to flow out for more than 5 seconds, replace valve.