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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Inspection of Fuel Pump Drive Control System


1. Disconnect ignition coil wire.
2. Grasp fuel line connected to injection mixer, then while cranking engine, check for feel of the pulsation of fuel through line.
3. If no fuel pulsation is felt, check ignition switch control relay and fuel pump.