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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Component Testing


CHECK VALVE

1. Ensure air flows from white or orange pipe to black pipe.
2. Ensure air does not flow from black pipe to white or orange pipe.

DISTRIBUTOR VACUUM ADVANCER

1. Remove distributor cap and rotor.
2. Apply vacuum to diaphragm and ensure vacuum advancer operates in conjunction with vacuum.
3. Install rotor and distributor cap.

HAC VALVE

1. Inspect air filter in HAC valve and clean as necessary.