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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Vacuum Leak Check


1. Remove air intake hoses.
2. Remove upper air cleaner housing, then remove hose from blow-off switching valve.
3. Remove lower air cleaner housing and air flow sensor.
4. Unscrew hot wire sensor from air flow housing, then plug openings in air flow meter.
5. Install air flow meter and lower air cleaner housing.
6. Apply approximately 7.25 psi to intake manifold, then spray suitable leak detecting fluid on all connections.
7. Bubbles will appear at all leaking joints.
8. Repair leaks as necessary.