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)

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Distributor Timing Advance

IGNITION TIMING CONTROL
The programmed ignition in this engine controls ignition timing with a microcomputer, which uses signals from the TDC/CKP/CYP sensor, throttle position (TP) sensor, engine coolant temperature (ECT) sensor and MAP sensor, to determine optimum timing. This system uses no governor or vacuum diaphragm.