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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Ignition System: Description and Operation

Fig. 39 Ignition timing control system.:







This system, Fig. 39, provides vacuum advance in response to manifold vacuum to optimize ignition timing during and after engine warm-up to control emission levels while maximizing fuel economy and engine performance.