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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Checking the Fuel Delivery System

Tests 621 - 624:




Test 625:





SYMPTOM
CHECKING FUEL DELIVERY

POSSIBLE CAUSES
- Fuel pump module defective
- Fuel inlet strainer plugged
- Fuel filter/pressure regulator defective (high)
- Fuel filter/pressure regulator defective (low)
- Fuel pump capacity (volume) out of specs