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)

Or, hide this message: temporarily or permanently

Vehicle Damage Warnings


^ Do not operate the fuel pump without fuel in tank.

^ Do not depress the accelerator pedal while trying to start the car.

^ In case of poor engine operation (misfiring), avoid driving the vehicle and correct the problem as soon as possible.

^ Do not disconnect a spark plug wire with the engine running.

^ Avoid push or pull starting the vehicle.

^ If running on a chassis dynamometer, make sure the catalytic converter is well ventilated.

^ To avoid damaging the oxygen sensor, use only sealants and lubricants that are approved for use on an oxygen sensor equipped vehicle.

^ When performing a compression test, remove the fuel pump relay. (This prevents fuel from being fed to the injectors).