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 Timing Control
PURPOSE The
Engine Control Module (ECM) controls the
Ignition timing in order to obtain the best balance of power, economy and low emissions.
OPERATION The
Engine Control Module (ECM) contains "data maps" for basic
ignition timing at various engine speeds and manifold pressures. Ignition timing is also adjusted for coolant temperature.