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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General Description

Fig. 37 Mixture control valve operation. Shown at constant RPM:




Fig. 38 Mixture control valve operation. Shown during deceleration:





The mixture control valve is controlled by intake manifold vacuum applied to an upper and lower chamber, Figs. 37 and 38. The valve allows fresh air to pass into the intake manifold during sudden high vacuum operation.