Operation CHARM: Car repair manuals for everyone.
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 Regulator (2-Port)



2-Port Vacuum Regulator:






1. Remove the vacuum line from the output port, and install a vacuum gauge.

2. With engine at idle, the vacuum gauge should read between 10.5-13.5" vacuum (35.7-45.9 kPa).

3. If the vacuum gauge reading is not within specified range, replace the regulator.