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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Powertrain Management: Tools and Equipment

The Following Tools Are Recommended For Diagnosis:
- Dwell Meter
- Tachometer
- Test light
- Ohmmeter
- Digital
- Voltmeter With 10 Megohms Impedance
- Vacuum Gauge/Vacuum Pump
- Jumper Wires

NOTE: Most dwell meters are compatible with this system. If engine operation changes when a dwell meter is connected to the mixture control solenoid, use a different meter. Meters with three leads are more likely to be able to measure solenoid dwell correctly than meters with two leads.