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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Air Injection Pump: Testing and Inspection


1. Connect tester 09258-14010 or equivalent to pump discharge hose.
2. Install a 0.217 inch (5.5 mm) orifice in tool.
3. Start engine and set to run 1800 RPM.
4. If tester reading is in red zone, or if pump produces abnormal knocking or grinding noises, pump is defective.