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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Ignition Timing: Adjustments

1. Engine should be at operating temperature.

Engine Component Locations:





2. Disconnect or clamp vacuum hose to vacuum advance unit. Hose can be found on right side of engine under rear part of intake manifold, between intake runners #4 and #5.
3. Start engine and run at 3000 rpm.
4. Check timing. Should be:

18° ± 2° BTDC 3000 rpm, vacuum unit disconnected