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

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Checking Injectors






Checking injectors

Checking injectors




- Make a note of which cylinder each spark plug belongs to
- Remove all spark plugs.
Check the color of the spark plug.

Is any spark plug lighter than the others?

Yes - Replacing the component

No - No Fault Found

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Replacing the component
Try a new injector on the relevant cylinder according to Injector/pulse damper, replacement Service and Repair.


Continue - Fault Found

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