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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AC11 - Check Fuel Pump



- No smoking nearby.

- Connect fuel pressure gauge.

- Note initial pressure reading.

- Observe pressure gauge as fuel system is pressurized. (Turn key to "RUN" for one second, then turn key to "OFF". Wait 10 seconds. Repeat five times).

- Does fuel pressure increase?

WARNING: If fuel starts leaking, turn key off immediately. No smoking.

Yes -- Go to pinpoint test step S1. S - System Check

No -- Go to Fuel Delivery and Air Induction to check for mechanical problems in fuel system.