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

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Non-Linear Vacuum Regulator (NLVR) Valve

1. Connect a suitable vacuum gauge to port D (Dist.) of NLVR valve.
2. Start and run engine at idle speed. Vacuum gauge should indicate approximately 7 in. Hg.
3. As engine speed is increased, carburetor ported vacuum should be indicated. If defective, replace valve.