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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Symptom Index

Diagnostic Symptom Index:






DRIVEABILITY DEFINITIONS
Stumble: Mild jerking during acceleration.
Hesitation: Delay in increase in engine speed occurring just after the accelerator pedal is depressed.
Surge: Continuous soft jerking during cruise.

PRECAUTIONS FOR SYMPTOM DIAGNOSIS




Fuel system pressure release

WARNING: The fuel system remains under pressure when the engine is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components. Fuel is explosive. an empty fuel tank can still contain explosive gases. supply adequate ventilation to the work area. Do not smoke, and keep sparks and open flames away. Refer to fuel system pressure release procedure.