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 Reducer Valve (VRV)

1. Connect a vacuum gauge to the outlet port of the valve and a hand operated vacuum pump to the inlet port.
2. Apply 15 inches Hg vacuum. The reading at the outlet port should be 1 1-2 inches lower and should read 13 to 13 1-2 inches Hg.
3. If the valve is not seating and bleeding off to vent, replace valve. If valves defective, engine idle will be rough and driveability of the vehicle will be affected.