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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Fuel Cut Check


1. Start and operate vehicle until coolant reaches normal operating temperature.
2. Listen to sound of injector, using a suitable stethoscope scope or equivalent, then increase engine speed to 3,000 RPM or higher.
3. Listen for sound to indicate operation of injector has stopped when throttle valve is closed instantly, then heard again when engine speed is increased to less than 1,900 RPM. The lower the water temperature, the higher the engine speed must be before the injector starts operating again. Ensure vehicle is at normal operating temperature when performing this test.
4. If sound of injector is not heard, check throttle position sensor as previously described.