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 Timing: Adjustments


Engine idle speed must be at manufactures curb idle specifications. Install jumper wire between the throttle switch and ground. Remove the vacuum hose from the Spark Control Computer and set timing to underhood label specifications. Replace the vacuum hose and remove the jumper wire.