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 Gauge/Economy Meter

Vacuum Gauge:

The Vacuum gauge consists of a gauge calibrated in inches of mercury and a hose which allows it to be attached to various components. The vacuum gauge is a valuable diagnosis tool in that it is able to "feel" the engines intake air system while the vehicles is running. Any interuption of the airflow through the engine and out the exhaust pipes is directly translated into movement of the vacuum gauge needle.