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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Spark Test





- Disconnect all injector couplers from injectors.

WARNING: Without disconnection of injector coupler, combustible gas may come out from spark plug holes during this test and may get ignited in engine room.

- Remove spark plugs and connect them to high-tension cords, and then ground spark plugs.
- Crank engine and check if each spark plug sparks.
- If no spark is emitted, inspect high-tension cords, spark plugs, ignition coil, distributor, etc.